diff --git a/ironic/api/controllers/v1/ramdisk.py b/ironic/api/controllers/v1/ramdisk.py
index 921a374927..8a12feca42 100644
--- a/ironic/api/controllers/v1/ramdisk.py
+++ b/ironic/api/controllers/v1/ramdisk.py
@@ -25,7 +25,6 @@ from ironic.api.controllers.v1 import types
 from ironic.api.controllers.v1 import utils as api_utils
 from ironic.api import expose
 from ironic.common import exception
-from ironic.common.i18n import _LW
 from ironic.common import policy
 from ironic.common import states
 from ironic.common import utils
@@ -119,10 +118,10 @@ class LookupController(rest.RestController):
 
         if invalid_addresses:
             node_log = ('' if not node_uuid
-                        else _LW('(Node UUID: %s)') % node_uuid)
-            LOG.warning(_LW('The following MAC addresses "%(addrs)s" are '
-                            'invalid and will be ignored by the lookup '
-                            'request %(node)s'),
+                        else '(Node UUID: %s)' % node_uuid)
+            LOG.warning('The following MAC addresses "%(addrs)s" are '
+                        'invalid and will be ignored by the lookup '
+                        'request %(node)s',
                         {'addrs': ', '.join(invalid_addresses),
                          'node': node_log})
 
diff --git a/ironic/api/hooks.py b/ironic/api/hooks.py
index 65321de6e8..94e89d98f8 100644
--- a/ironic/api/hooks.py
+++ b/ironic/api/hooks.py
@@ -23,7 +23,6 @@ import six
 from six.moves import http_client
 
 from ironic.common import context
-from ironic.common.i18n import _LW
 from ironic.common import policy
 from ironic.conductor import rpcapi
 from ironic.db import api as dbapi
@@ -48,19 +47,19 @@ def policy_deprecation_check():
             str_rule = six.text_type(rule)
             for deprecated, replacement in substitution_dict.items():
                 if re.search(r'\b%s\b' % deprecated, str_rule):
-                    LOG.warning(_LW(
+                    LOG.warning(
                         "Deprecated argument %(deprecated)s is used in policy "
                         "file rule (%(rule)s), please use %(replacement)s "
                         "argument instead. The possibility to use deprecated "
-                        "arguments will be removed in the Pike release."),
+                        "arguments will be removed in the Pike release.",
                         {'deprecated': deprecated, 'replacement': replacement,
                          'rule': str_rule})
                     if deprecated == 'domain_name':
-                        LOG.warning(_LW(
+                        LOG.warning(
                             "Please note that user_domain_id is an ID of the "
                             "user domain, while the deprecated domain_name is "
                             "its name. The policy rule has to be updated "
-                            "accordingly."))
+                            "accordingly.")
         CHECKED_DEPRECATED_POLICY_ARGS = True
 
 
diff --git a/ironic/api/middleware/auth_token.py b/ironic/api/middleware/auth_token.py
index c2aba19fab..1cf1f59819 100644
--- a/ironic/api/middleware/auth_token.py
+++ b/ironic/api/middleware/auth_token.py
@@ -42,10 +42,8 @@ class AuthTokenMiddleware(auth_token.AuthProtocol):
             self.public_api_routes = [re.compile(route_pattern_tpl % route_tpl)
                                       for route_tpl in api_routes]
         except re.error as e:
-            msg = _('Cannot compile public API routes: %s') % e
-
-            LOG.error(msg)
-            raise exception.ConfigInvalid(error_msg=msg)
+            raise exception.ConfigInvalid(
+                error_msg=_('Cannot compile public API routes: %s') % e)
 
         super(AuthTokenMiddleware, self).__init__(app, conf)
 
diff --git a/ironic/api/middleware/parsable_error.py b/ironic/api/middleware/parsable_error.py
index b0de053029..6e742c0692 100644
--- a/ironic/api/middleware/parsable_error.py
+++ b/ironic/api/middleware/parsable_error.py
@@ -27,7 +27,7 @@ from oslo_log import log
 import six
 import webob
 
-from ironic.common.i18n import _, _LE
+from ironic.common.i18n import _
 
 LOG = log.getLogger(__name__)
 
@@ -76,7 +76,7 @@ class ParsableErrorMiddleware(object):
                                                       + '\n'.join(app_iter)
                                                       + '</error_message>'))]
                 except et.ElementTree.ParseError as err:
-                    LOG.error(_LE('Error parsing HTTP response: %s'), err)
+                    LOG.error('Error parsing HTTP response: %s', err)
                     body = ['<error_message>%s' % state['status_code']
                             + '</error_message>']
                 state['headers'].append(('Content-Type', 'application/xml'))