diff --git a/doc/source/contributor/topics/tables.rst b/doc/source/contributor/topics/tables.rst
index e8c3225363..6cea53a61e 100644
--- a/doc/source/contributor/topics/tables.rst
+++ b/doc/source/contributor/topics/tables.rst
@@ -289,53 +289,6 @@ Example::
                                                    admin=True)
             return project_info
 
-Updating changed cell data (DEPRECATED)
----------------------------------------
-
-Define an ``update_cell`` method in the class inherited from
-``tables.UpdateAction``. This method takes care of saving the data of the
-table cell. There can be one class for every cell thanks to the
-``cell_name`` parameter. This class is then defined in tables column as
-``update_action=UpdateCell``, so each column can have its own updating
-method.
-
-Example::
-
-    class UpdateCell(tables.UpdateAction):
-        def allowed(self, request, project, cell):
-            # Determines whether given cell or row will be inline editable
-            # for signed in user.
-            return api.keystone.keystone_can_edit_project()
-
-        def update_cell(self, request, project_id, cell_name, new_cell_value):
-            # in-line update project info
-            try:
-                project_obj = datum
-                # updating changed value by new value
-                setattr(project_obj, cell_name, new_cell_value)
-
-                # sending new attributes back to API
-                api.keystone.tenant_update(
-                    request,
-                    project_id,
-                    name=project_obj.name,
-                    description=project_obj.description,
-                    enabled=project_obj.enabled)
-
-            except Conflict:
-                # Validation error for naming conflict, raised when user
-                # choose the existing name. We will raise a
-                # ValidationError, that will be sent back to the client
-                # browser and shown inside of the table cell.
-                message = _("This name is already taken.")
-                raise ValidationError(message)
-            except:
-                # Other exception of the API just goes through standard
-                # channel
-                exceptions.handle(request, ignore=True)
-                return False
-            return True
-
 Defining a form_field for each Column that we want to be in-line edited.
 ------------------------------------------------------------------------
 
diff --git a/doc/source/contributor/tutorials/dashboard.rst b/doc/source/contributor/tutorials/dashboard.rst
index 0771719c40..8eb3e1f5b4 100644
--- a/doc/source/contributor/tutorials/dashboard.rst
+++ b/doc/source/contributor/tutorials/dashboard.rst
@@ -285,7 +285,6 @@ classes:
 
 - :class:`~horizon.tables.BatchAction`
 - :class:`~horizon.tables.DeleteAction`
-- :class:`~horizon.tables.UpdateAction` **DEPRECATED**
 - :class:`~horizon.tables.FixedFilterAction`
 
 
diff --git a/horizon/static/horizon/js/horizon.tables_inline_edit.js b/horizon/static/horizon/js/horizon.tables_inline_edit.js
deleted file mode 100644
index ce868e9c80..0000000000
--- a/horizon/static/horizon/js/horizon.tables_inline_edit.js
+++ /dev/null
@@ -1,277 +0,0 @@
-/**
- * Licensed under the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License. You may obtain
- * a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
-
-//TODO(lcastell):Inline edit is deprecated and will be removed in Horizon 12.0
-horizon.inline_edit = {
-  get_cell_id: function (td_element) {
-    return [
-      td_element.parents("tr").first().data("object-id"),
-      "__",
-      td_element.data("cell-name")
-    ].join('');
-  },
-  get_object_container: function () {
-    // global cell object container
-    if (!window.cell_object_container) {
-      window.cell_object_container = [];
-    }
-    return window.cell_object_container;
-  },
-  get_cell_object: function (td_element) {
-    var cell_id = horizon.inline_edit.get_cell_id(td_element);
-    var id = "cell__" + cell_id;
-    var container = horizon.inline_edit.get_object_container(td_element);
-    var cell_object;
-    if (container && container[id]){
-      // if cell object exists, I will reuse it
-      cell_object = container[id];
-      cell_object.reset_with(td_element);
-      return cell_object;
-    } else {
-      // or I will create new cell object
-      cell_object = new horizon.inline_edit.Cell(td_element);
-      // saving cell object to global container
-      container[id] = cell_object;
-      return cell_object;
-    }
-  },
-  Cell: function (td_element){
-    var self = this;
-
-    // setting initial attributes
-    self.reset_with = function(td_element){
-      self.td_element = td_element;
-      self.form_element = td_element.find("input, textarea");
-      self.url = td_element.data('update-url');
-      self.inline_edit_mod = false;
-      self.successful_update = false;
-    };
-    self.reset_with(td_element);
-
-    self.refresh = function () {
-      horizon.ajax.queue({
-        url: self.url,
-        data: {'inline_edit_mod': self.inline_edit_mod},
-        beforeSend: function () {
-          self.start_loading();
-        },
-        complete: function () {
-          // Bug in jQuery tool-tip, if I hover tool-tip, then confirm the field with
-          // enter and the cell is reloaded, tool-tip stays. So just to be sure, I am
-          // removing tool-tips manually
-          $(".tooltip.fade.top.in").remove();
-          self.stop_loading();
-
-          if (self.successful_update) {
-            // if cell was updated successfully, I will show fading check sign
-            var success = $('<div class="success"></div>');
-            self.td_element.find('.inline-edit-status').append(success);
-
-            // edit pencil will disappear and appear again once the check sign has faded
-            // also green background will disappear
-            self.td_element.addClass("no-transition");
-            self.td_element.addClass("success");
-            self.td_element.removeClass("no-transition");
-
-            self.td_element.removeClass("inline_edit_available");
-
-            success.fadeOut(1300, function () {
-              self.td_element.addClass("inline_edit_available");
-              self.td_element.removeClass("success");
-            });
-          }
-        },
-        error: function(jqXHR) {
-          if (jqXHR.status === 401){
-            var redir_url = jqXHR.getResponseHeader("X-Horizon-Location");
-            if (redir_url){
-              location.href = redir_url;
-            } else {
-              horizon.toast.add("error", gettext("Not authorized to do this operation."));
-            }
-          }
-          else {
-            if (!horizon.ajax.get_messages(jqXHR)) {
-              // Generic error handler. Really generic.
-              horizon.toast.add("error", gettext("An error occurred. Please try again later."));
-            }
-          }
-        },
-        success: function (data) {
-          var $td_element = $(data);
-          var $tr, $cell_wrapper, td_element_text;
-          self.form_element = self.get_form_element($td_element);
-
-          if (self.inline_edit_mod) {
-            var cellWidth = self.td_element.outerWidth(true);
-            $td_element.width(cellWidth);
-            $td_element.addClass("has-form");
-          }
-          // saving old td_element for cancel and loading purposes
-          self.cached_presentation_view = self.td_element;
-          // replacing old td with the new td element returned from the server
-          self.rewrite_cell($td_element);
-          // keeping parent tr's data-display attr up to date
-          $tr = $td_element.closest('tr');
-          if ($td_element.attr('data-cell-name') === $tr.attr('data-display-key')) {
-            $cell_wrapper= $td_element.find('.table_cell_data_wrapper');
-            if ($cell_wrapper.length) {
-              td_element_text = $cell_wrapper.find('a').text();
-              if ($tr.attr('data-display') !== td_element_text) {
-                $tr.attr('data-display', td_element_text);
-              }
-            }
-          }
-          // focusing the form element inside the cell
-          if (self.inline_edit_mod) {
-            self.form_element.focus();
-          }
-        }
-      });
-    };
-    self.update = function(post_data){
-      // make the update request
-      horizon.ajax.queue({
-        type: 'POST',
-        url: self.url,
-        data: post_data,
-        beforeSend: function () {
-          self.start_loading();
-        },
-        complete: function () {
-          if (!self.successful_update){
-            self.stop_loading();
-          }
-        },
-        error: function(jqXHR) {
-          if (jqXHR.status === 400){
-            // make place for error icon, only if the error icon is not already present
-            if (self.td_element.find(".inline-edit-error .error").length <= 0) {
-              self.form_element.css('padding-left', '20px');
-              self.form_element.width(self.form_element.width() - 20);
-            }
-            // obtain the error message from response body
-            var error_message = $.parseJSON(jqXHR.responseText).message;
-            // insert the error icon
-            var error = $('<div title="' + error_message + '" class="error"></div>');
-            self.td_element.find(".inline-edit-error").html(error);
-            error.tooltip({'placement':'top'});
-          }
-          else if (jqXHR.status === 401){
-            var redir_url = jqXHR.getResponseHeader("X-Horizon-Location");
-            if (redir_url){
-              location.href = redir_url;
-            } else {
-              horizon.toast.add("error", gettext("Not authorized to do this operation."));
-            }
-          }
-          else {
-            if (!horizon.ajax.get_messages(jqXHR)) {
-              // Generic error handler. Really generic.
-              horizon.toast.add("error", gettext("An error occurred. Please try again later."));
-            }
-          }
-        },
-        success: function () {
-          // if update was successful
-          self.successful_update = true;
-          self.refresh();
-        }
-      });
-    };
-    self.cancel = function() {
-      self.rewrite_cell(self.cached_presentation_view);
-      self.stop_loading();
-    };
-    self.get_form_element = function(td_element){
-      return td_element.find("input, textarea");
-    };
-    self.rewrite_cell = function(td_element){
-      self.td_element.replaceWith(td_element);
-      self.td_element = td_element;
-    };
-    self.start_loading = function() {
-      self.td_element.addClass("no-transition");
-
-      var spinner = $('<div class="loading"></div>');
-      self.td_element.find('.inline-edit-status').append(spinner);
-      self.td_element.addClass("loading");
-      self.td_element.removeClass("inline_edit_available");
-      self.get_form_element(self.td_element).attr("disabled", "disabled");
-    };
-    self.stop_loading = function() {
-      self.td_element.find('div.inline-edit-status div.loading').remove();
-      self.td_element.removeClass("loading");
-      self.td_element.addClass("inline_edit_available");
-      self.get_form_element(self.td_element).removeAttr("disabled");
-    };
-  }
-};
-
-
-horizon.addInitFunction(horizon.inline_edit.init = function(parent) {
-  parent = parent || document;
-  var $table = $(parent).find('table');
-
-  $table.on('click', '.ajax-inline-edit', function (evt) {
-    var $this = $(this);
-    var td_element = $this.parents('td').first();
-
-    var cell = horizon.inline_edit.get_cell_object(td_element);
-    cell.inline_edit_mod = true;
-    cell.refresh();
-
-    evt.preventDefault();
-  });
-
-  var submit_form = function(evt, el){
-    var $submit = $(el);
-    var td_element = $submit.parents('td').first();
-    var post_data = $submit.parents('form').first().serialize();
-
-    var cell = horizon.inline_edit.get_cell_object(td_element);
-    cell.update(post_data);
-
-    evt.preventDefault();
-  };
-
-  $table.on('click', '.inline-edit-submit', function (evt) {
-    submit_form(evt, this);
-  });
-
-  $table.on('keypress', '.inline-edit-form', function (evt) {
-    if (evt.which === 13 && !evt.shiftKey) {
-      submit_form(evt, this);
-    }
-  });
-
-  $table.on('click', '.inline-edit-cancel', function (evt) {
-    var $cancel = $(this);
-    var td_element = $cancel.parents('td').first();
-
-    var cell = horizon.inline_edit.get_cell_object(td_element);
-    cell.cancel();
-
-    evt.preventDefault();
-  });
-
-  $table.on('mouseenter', '.inline_edit_available', function () {
-    $(this).find(".table_cell_action").fadeIn(100);
-  });
-
-  $table.on('mouseleave', '.inline_edit_available', function () {
-    $(this).find(".table_cell_action").fadeOut(200);
-  });
-});
-
diff --git a/horizon/static/horizon/js/horizon.tabs.js b/horizon/static/horizon/js/horizon.tabs.js
index 8b86551ad0..81df14b0fc 100644
--- a/horizon/static/horizon/js/horizon.tabs.js
+++ b/horizon/static/horizon/js/horizon.tabs.js
@@ -124,5 +124,3 @@ horizon.addInitFunction(horizon.tabs.init = function () {
   });
 });
 
-//TODO(lcastell):Inline edit is deprecated and will be removed in Horizon 12.0
-horizon.tabs.addTabLoadFunction(horizon.inline_edit.init);
diff --git a/horizon/tables/__init__.py b/horizon/tables/__init__.py
index ed20462eb9..2a8840423d 100644
--- a/horizon/tables/__init__.py
+++ b/horizon/tables/__init__.py
@@ -22,7 +22,6 @@ from horizon.tables.actions import FilterAction
 from horizon.tables.actions import FixedFilterAction
 from horizon.tables.actions import LinkAction
 from horizon.tables.actions import NameFilterAction
-from horizon.tables.actions import UpdateAction
 from horizon.tables.base import Column
 from horizon.tables.base import DataTable
 from horizon.tables.base import Row
@@ -42,7 +41,6 @@ __all__ = [
     'FixedFilterAction',
     'LinkAction',
     'NameFilterAction',
-    'UpdateAction',
     'Column',
     'DataTable',
     'Row',
diff --git a/horizon/tables/actions.py b/horizon/tables/actions.py
index b3f07b90a2..1011bdaa3b 100644
--- a/horizon/tables/actions.py
+++ b/horizon/tables/actions.py
@@ -26,7 +26,6 @@ from django import urls
 from django.utils.functional import Promise
 from django.utils.http import urlencode
 from django.utils.translation import ugettext_lazy as _
-from django.utils.translation import ungettext_lazy
 import six
 
 from horizon import exceptions
@@ -964,61 +963,3 @@ class handle_exception_with_detail_message(object):
                 # just to re-raise the exception.
                 raise
         return decorated
-
-
-class Deprecated(type):
-    # TODO(lcastell) Replace class with similar functionality from
-    # oslo_log.versionutils when it's finally added in 11.0
-    def __new__(meta, name, bases, kwargs):
-        cls = super(Deprecated, meta).__new__(meta, name, bases, kwargs)
-        if name != 'UpdateAction':
-            LOG.warning(
-                "WARNING:The UpdateAction class defined in module '%(mod)s' "
-                "is deprecated as of Newton and may be removed in "
-                "Horizon P (12.0). Class '%(name)s' defined at "
-                "module '%(module)s' shall no longer subclass it.",
-                {'mod': UpdateAction.__module__,
-                 'name': name,
-                 'module': kwargs['__module__']})
-        return cls
-
-
-@six.add_metaclass(Deprecated)
-class UpdateAction(object):
-    """**DEPRECATED**: A table action for cell updates by inline editing."""
-
-    name = "update"
-
-    def action(self, request, datum, obj_id, cell_name, new_cell_value):
-        self.update_cell(request, datum, obj_id, cell_name, new_cell_value)
-
-    @staticmethod
-    def action_present(count):
-        return ungettext_lazy(
-            u"Update Item",
-            u"Update Items",
-            count
-        )
-
-    @staticmethod
-    def action_past(count):
-        return ungettext_lazy(
-            u"Updated Item",
-            u"Updated Items",
-            count
-        )
-
-    def update_cell(self, request, datum, obj_id, cell_name, new_cell_value):
-        """Method for saving data of the cell.
-
-        This method must implements saving logic of the inline edited table
-        cell.
-        """
-
-    def allowed(self, request, datum, cell):
-        """Determine whether updating is allowed for the current request.
-
-        This method is meant to be overridden with more specific checks.
-        Data of the row and of the cell are passed to the method.
-        """
-        return True
diff --git a/horizon/test/templates/base.html b/horizon/test/templates/base.html
index 819643c230..d3379035eb 100644
--- a/horizon/test/templates/base.html
+++ b/horizon/test/templates/base.html
@@ -65,7 +65,6 @@
 
     <script src='{{ STATIC_URL }}horizon/js/horizon.modals.js'></script>
     <script src='{{ STATIC_URL }}horizon/js/horizon.tables.js'></script>
-    <script src='{{ STATIC_URL }}horizon/js/horizon.tables_inline_edit.js'></script>
     <script src='{{ STATIC_URL }}horizon/js/horizon.tabs.js'></script>
 
     <script>
diff --git a/horizon/test/unit/tables/test_tables.py b/horizon/test/unit/tables/test_tables.py
index a2ef8b168e..ec395df77b 100644
--- a/horizon/test/unit/tables/test_tables.py
+++ b/horizon/test/unit/tables/test_tables.py
@@ -253,19 +253,6 @@ class MyServerFilterAction(tables.FilterAction):
         return items
 
 
-class MyUpdateAction(tables.UpdateAction):
-    def allowed(self, *args):
-        return True
-
-    def update_cell(self, *args):
-        pass
-
-
-class MyUpdateActionNotAllowed(MyUpdateAction):
-    def allowed(self, *args):
-        return False
-
-
 def get_name(obj):
     return "custom %s" % obj.name
 
@@ -284,8 +271,7 @@ class MyTable(tables.DataTable):
                          verbose_name="Verbose Name",
                          sortable=True,
                          form_field=forms.CharField(required=True),
-                         form_field_attributes={'class': 'test'},
-                         update_action=MyUpdateAction)
+                         form_field_attributes={'class': 'test'})
     value = tables.Column('value',
                           sortable=True,
                           link='http://example.com/',
@@ -345,8 +331,7 @@ class MyTableNotAllowedInlineEdit(MyTable):
                          verbose_name="Verbose Name",
                          sortable=True,
                          form_field=forms.CharField(required=True),
-                         form_field_attributes={'class': 'test'},
-                         update_action=MyUpdateActionNotAllowed)
+                         form_field_attributes={'class': 'test'})
 
     class Meta(object):
         name = "my_table"
@@ -358,7 +343,6 @@ class MyTableWrapList(MyTable):
     name = tables.Column('name',
                          form_field=forms.CharField(required=True),
                          form_field_attributes={'class': 'test'},
-                         update_action=MyUpdateActionNotAllowed,
                          wrap_list=True)
     value = tables.Column('value',
 
@@ -443,7 +427,6 @@ class DataTableTests(test.TestCase):
                          actions.get_final_attrs().get('class', ""))
         # In-line edit action on column.
         name_column = self.table.columns['name']
-        self.assertEqual(MyUpdateAction, name_column.update_action)
         self.assertEqual(forms.CharField, name_column.form_field.__class__)
         self.assertEqual({'class': 'test'}, name_column.form_field_attributes)
 
@@ -728,96 +711,6 @@ class DataTableTests(test.TestCase):
         self.assertNotContains(resp_optional, '<ul>')
         self.assertNotContains(resp_optional, '</ul>')
 
-    def test_inline_edit_available_cell_rendering(self):
-        self.table = MyTable(self.request, TEST_DATA_2)
-        row = self.table.get_rows()[0]
-        name_cell = row.cells['name']
-
-        # Check if in-line edit is available in the cell,
-        # but is not in inline_edit_mod.
-        self.assertTrue(name_cell.inline_edit_available)
-        self.assertFalse(name_cell.inline_edit_mod)
-
-        # Check if is cell is rendered correctly.
-        name_cell_rendered = name_cell.render()
-        resp = http.HttpResponse(name_cell_rendered)
-
-        self.assertContains(resp, '<td', 1)
-        self.assertContains(resp, 'inline_edit_available', 1)
-        self.assertContains(resp,
-                            'data-update-url="?action=cell_update&amp;'
-                            'table=my_table&amp;cell_name=name&amp;obj_id=1"',
-                            1)
-        self.assertContains(resp, 'table_cell_wrapper', 1)
-        self.assertContains(resp, 'table_cell_data_wrapper', 1)
-        self.assertContains(resp, 'table_cell_action', 1)
-        self.assertContains(resp, 'ajax-inline-edit', 1)
-
-    def test_inline_edit_available_not_allowed_cell_rendering(self):
-        self.table = MyTableNotAllowedInlineEdit(self.request, TEST_DATA_2)
-
-        row = self.table.get_rows()[0]
-        name_cell = row.cells['name']
-
-        # Check if in-line edit is available in the cell,
-        # but is not in inline_edit_mod.
-        self.assertTrue(name_cell.inline_edit_available)
-        self.assertFalse(name_cell.inline_edit_mod)
-
-        # Check if is cell is rendered correctly.
-        name_cell_rendered = name_cell.render()
-        resp = http.HttpResponse(name_cell_rendered)
-
-        self.assertContains(resp, '<td', 1)
-        self.assertContains(resp, 'inline_edit_available', 1)
-        self.assertContains(resp,
-                            'data-update-url="?action=cell_update&amp;'
-                            'table=my_table&amp;cell_name=name&amp;obj_id=1"',
-                            1)
-        self.assertContains(resp, 'table_cell_wrapper', 0)
-        self.assertContains(resp, 'table_cell_data_wrapper', 0)
-        self.assertContains(resp, 'table_cell_action', 0)
-        self.assertContains(resp, 'ajax-inline-edit', 0)
-
-    def test_inline_edit_mod_cell_rendering(self):
-        self.table = MyTable(self.request, TEST_DATA_2)
-        name_col = self.table.columns['name']
-        name_col.auto = "form_field"
-
-        row = self.table.get_rows()[0]
-        name_cell = row.cells['name']
-        name_cell.inline_edit_mod = True
-
-        # Check if in-line edit is available in the cell,
-        # and is in inline_edit_mod, also column auto must be
-        # set as form_field.
-        self.assertTrue(name_cell.inline_edit_available)
-        self.assertTrue(name_cell.inline_edit_mod)
-        self.assertEqual('form_field',
-                         name_col.auto)
-
-        # Check if is cell is rendered correctly.
-        name_cell_rendered = name_cell.render()
-        resp = http.HttpResponse(name_cell_rendered)
-
-        self.assertContains(resp,
-                            '<input class="test" id="name__1" name="name__1"'
-                            ' type="text" value="custom object_1" />',
-                            count=1, html=True)
-
-        self.assertContains(resp, '<td', 1)
-        self.assertContains(resp, 'inline_edit_available', 1)
-        self.assertContains(resp,
-                            'data-update-url="?action=cell_update&amp;'
-                            'table=my_table&amp;cell_name=name&amp;obj_id=1"',
-                            1)
-        self.assertContains(resp, 'table_cell_wrapper', 1)
-        self.assertContains(resp, 'inline-edit-error', 1)
-        self.assertContains(resp, 'inline-edit-form', 1)
-        self.assertContains(resp, 'inline-edit-actions', 1)
-        self.assertContains(resp, 'inline-edit-submit', 1)
-        self.assertContains(resp, 'inline-edit-cancel', 1)
-
     def test_inline_edit_mod_checkbox_with_label(self):
         class TempTable(MyTable):
             name = tables.Column(get_name,
@@ -826,8 +719,7 @@ class DataTableTests(test.TestCase):
                                  form_field=forms.BooleanField(
                                      required=True,
                                      label="Verbose Name"),
-                                 form_field_attributes={'class': 'test'},
-                                 update_action=MyUpdateAction)
+                                 form_field_attributes={'class': 'test'})
 
             class Meta(object):
                 name = "my_table"
@@ -850,10 +742,6 @@ class DataTableTests(test.TestCase):
                             'id="name__1" name="name__1" type="checkbox" '
                             'value="custom object_1" />',
                             count=1, html=True)
-        self.assertContains(resp,
-                            '<label class="inline-edit-label" for="name__1">'
-                            'Verbose Name</label>',
-                            count=1, html=True)
 
     def test_table_search_action(self):
         class TempTable(MyTable):
@@ -900,8 +788,7 @@ class DataTableTests(test.TestCase):
                                  form_field=forms.CharField(
                                      widget=forms.Textarea(),
                                      required=False),
-                                 form_field_attributes={'class': 'test'},
-                                 update_action=MyUpdateAction)
+                                 form_field_attributes={'class': 'test'})
 
             class Meta(object):
                 name = "my_table"
@@ -1137,121 +1024,6 @@ class DataTableTests(test.TestCase):
                                   u'FakeObject: öbject_4'],
                                  transform=six.text_type)
 
-    def test_inline_edit_update_action_get_non_ajax(self):
-        # Non ajax inline edit request should return None.
-        url = ('/my_url/?action=cell_update'
-               '&table=my_table&cell_name=name&obj_id=1')
-        req = self.factory.get(url, {})
-        self.table = MyTable(req, TEST_DATA_2)
-        handled = self.table.maybe_preempt()
-        # Checking the response header.
-        self.assertIsNone(handled)
-
-    def test_inline_edit_update_action_get(self):
-        # Get request should return td field with data.
-        url = ('/my_url/?action=cell_update'
-               '&table=my_table&cell_name=name&obj_id=1')
-        req = self.factory.get(url, {},
-                               HTTP_X_REQUESTED_WITH='XMLHttpRequest')
-        self.table = MyTable(req, TEST_DATA_2)
-        handled = self.table.maybe_preempt()
-        # Checking the response header.
-        self.assertEqual(200, handled.status_code)
-        # Checking the response content.
-        resp = handled
-        self.assertContains(resp, '<td', 1)
-        self.assertContains(resp, 'inline_edit_available', 1)
-        self.assertContains(
-            resp,
-            'data-update-url="/my_url/?action=cell_update&amp;'
-            'table=my_table&amp;cell_name=name&amp;obj_id=1"',
-            1)
-        self.assertContains(resp, 'table_cell_wrapper', 1)
-        self.assertContains(resp, 'table_cell_data_wrapper', 1)
-        self.assertContains(resp, 'table_cell_action', 1)
-        self.assertContains(resp, 'ajax-inline-edit', 1)
-
-    def test_inline_edit_update_action_get_not_allowed(self):
-        # Name column has required validation, sending blank
-        # will return error.
-        url = ('/my_url/?action=cell_update'
-               '&table=my_table&cell_name=name&obj_id=1')
-        req = self.factory.post(url, {})
-        self.table = MyTableNotAllowedInlineEdit(req, TEST_DATA_2)
-        handled = self.table.maybe_preempt()
-        # Checking the response header.
-        self.assertEqual(401, handled.status_code)
-
-    def test_inline_edit_update_action_get_inline_edit_mod(self):
-        # Get request in inline_edit_mode should return td with form field.
-        url = ('/my_url/?inline_edit_mod=true&action=cell_update'
-               '&table=my_table&cell_name=name&obj_id=1')
-        req = self.factory.get(url, {},
-                               HTTP_X_REQUESTED_WITH='XMLHttpRequest')
-        self.table = MyTable(req, TEST_DATA_2)
-        handled = self.table.maybe_preempt()
-        # Checking the response header.
-        self.assertEqual(200, handled.status_code)
-        # Checking the response content.
-        resp = handled
-        self.assertContains(resp,
-                            '<input class="test" id="name__1" name="name__1"'
-                            ' type="text" value="custom object_1" />',
-                            count=1, html=True)
-
-        self.assertContains(resp, '<td', 1)
-        self.assertContains(resp, 'inline_edit_available', 1)
-        self.assertContains(
-            resp,
-            'data-update-url="/my_url/?action=cell_update&amp;'
-            'table=my_table&amp;cell_name=name&amp;obj_id=1"',
-            1)
-        self.assertContains(resp, 'table_cell_wrapper', 1)
-        self.assertContains(resp, 'inline-edit-error', 1)
-        self.assertContains(resp, 'inline-edit-form', 1)
-        self.assertContains(resp, 'inline-edit-actions', 1)
-        self.assertContains(resp, '<button', 2)
-        self.assertContains(resp, 'inline-edit-submit', 1)
-        self.assertContains(resp, 'inline-edit-cancel', 1)
-
-    def test_inline_edit_update_action_post(self):
-        # Post request should invoke the cell update table action.
-        url = ('/my_url/?action=cell_update'
-               '&table=my_table&cell_name=name&obj_id=1')
-        req = self.factory.post(url, {'name__1': 'test_name'})
-        self.table = MyTable(req, TEST_DATA_2)
-        # checking the response header
-        handled = self.table.maybe_preempt()
-        self.assertEqual(200, handled.status_code)
-
-    def test_inline_edit_update_action_post_not_allowed(self):
-        # Post request should invoke the cell update table action.
-        url = ('/my_url/?action=cell_update'
-               '&table=my_table&cell_name=name&obj_id=1')
-        req = self.factory.post(url, {'name__1': 'test_name'})
-        self.table = MyTableNotAllowedInlineEdit(req, TEST_DATA_2)
-        # checking the response header
-        handled = self.table.maybe_preempt()
-        self.assertEqual(401, handled.status_code)
-
-    def test_inline_edit_update_action_post_validation_error(self):
-        # Name column has required validation, sending blank
-        # will return error.
-        url = ('/my_url/?action=cell_update'
-               '&table=my_table&cell_name=name&obj_id=1')
-        req = self.factory.post(url, {})
-        self.table = MyTable(req, TEST_DATA_2)
-        handled = self.table.maybe_preempt()
-        # Checking the response header.
-        self.assertEqual(400, handled.status_code)
-        self.assertEqual(('Content-Type', 'application/json'),
-                         handled._headers['content-type'])
-        # Checking the response content.
-        resp = handled
-        self.assertContains(resp,
-                            '"message": "This field is required."',
-                            count=1, status_code=400)
-
     def test_column_uniqueness(self):
         table1 = MyTable(self.request)
         table2 = MyTable(self.request)
diff --git a/openstack_dashboard/templates/horizon/_scripts.html b/openstack_dashboard/templates/horizon/_scripts.html
index 49d75d8c94..7e56f029f6 100644
--- a/openstack_dashboard/templates/horizon/_scripts.html
+++ b/openstack_dashboard/templates/horizon/_scripts.html
@@ -35,7 +35,6 @@
 <script src='{{ STATIC_URL }}horizon/js/horizon.selenium.js'></script>
 {% endif %}
 <script src='{{ STATIC_URL }}horizon/js/horizon.tables.js'></script>
-<script src='{{ STATIC_URL }}horizon/js/horizon.tables_inline_edit.js'></script>
 <script src='{{ STATIC_URL }}horizon/js/horizon.tabs.js'></script>
 <script src='{{ STATIC_URL }}horizon/js/horizon.templates.js'></script>
 <script src='{{ STATIC_URL }}horizon/js/horizon.users.js'></script>
diff --git a/releasenotes/notes/remove-table-update-action-d3fc1c5e5e3598b0.yaml b/releasenotes/notes/remove-table-update-action-d3fc1c5e5e3598b0.yaml
new file mode 100644
index 0000000000..bd365cd131
--- /dev/null
+++ b/releasenotes/notes/remove-table-update-action-d3fc1c5e5e3598b0.yaml
@@ -0,0 +1,5 @@
+---
+other:
+  - |
+    UpdateAction is deprecated in Newton and removed now. You should not use
+    inline edit functionality in your plugins anymore.