diff --git a/README.rst b/README.rst
index 028448f0fc2f..b88b4a2955df 100644
--- a/README.rst
+++ b/README.rst
@@ -10,7 +10,7 @@ OpenStack Nova
 
 OpenStack Nova provides a cloud computing fabric controller, supporting a wide
 variety of compute technologies, including: libvirt (KVM, Xen, LXC and more),
-Hyper-V, VMware and OpenStack Ironic.
+VMware and OpenStack Ironic.
 
 Use the following resources to learn more.
 
diff --git a/doc/source/configuration/extra-specs.rst b/doc/source/configuration/extra-specs.rst
index 94233c5e947f..dc1347824f00 100644
--- a/doc/source/configuration/extra-specs.rst
+++ b/doc/source/configuration/extra-specs.rst
@@ -176,10 +176,9 @@ They are only supported by the libvirt virt driver.
 ``os``
 ~~~~~~
 
-The following extra specs are used to configure various attributes of
-instances when using the HyperV virt driver.
+The following extra specs are used to configure secure_boot.
 
-They are only supported by the HyperV virt driver.
+They are only supported by the libvirt virt driver.
 
 .. extra-specs:: os
 
diff --git a/nova/api/validation/extra_specs/os.py b/nova/api/validation/extra_specs/os.py
index 09ba6283ea30..b16756fe1034 100644
--- a/nova/api/validation/extra_specs/os.py
+++ b/nova/api/validation/extra_specs/os.py
@@ -17,14 +17,14 @@
 from nova.api.validation.extra_specs import base
 
 
-# TODO(stephenfin): Most of these belong in the 'hw:' or 'hyperv:' namespace
+# TODO(stephenfin): Most of these belong in the 'hw:' namespace
 # and should be moved.
 EXTRA_SPEC_VALIDATORS = [
     base.ExtraSpecValidator(
         name='os:secure_boot',
         description=(
             'Determine whether secure boot is enabled or not. Only supported '
-            'by the libvirt and HyperV virt drivers.'
+            'by the libvirt virt drivers.'
         ),
         value={
             'type': str,
@@ -35,59 +35,6 @@ EXTRA_SPEC_VALIDATORS = [
             ],
         },
     ),
-    base.ExtraSpecValidator(
-        name='os:resolution',
-        description=(
-            'Guest VM screen resolution size. Only supported by the HyperV '
-            'driver.'
-        ),
-        value={
-            'type': str,
-            'description': 'The chosen resolution',
-            'enum': [
-                '1024x768',
-                '1280x1024',
-                '1600x1200',
-                '1920x1200',
-                '2560x1600',
-                '3840x2160',
-            ],
-        },
-    ),
-    base.ExtraSpecValidator(
-        name='os:monitors',
-        description=(
-            'Guest VM number of monitors. Only supported by the HyperV driver.'
-        ),
-        value={
-            'type': int,
-            'description': 'The number of monitors enabled',
-            'min': 1,
-            'max': 8,
-        },
-    ),
-    # TODO(stephenfin): Consider merging this with the 'hw_video_ram' image
-    # metadata property or adding a 'hw:video_ram' extra spec that works for
-    # both Hyper-V and libvirt.
-    base.ExtraSpecValidator(
-        name='os:vram',
-        description=(
-            'Guest VM VRAM amount. Only supported by the HyperV driver.'
-        ),
-        # NOTE(stephenfin): This is really an int, but because there's a
-        # limited range of options we treat it as a string
-        value={
-            'type': str,
-            'description': 'Amount of VRAM to allocate to instance',
-            'enum': [
-                '64',
-                '128',
-                '256',
-                '512',
-                '1024',
-            ],
-        },
-    ),
 ]
 
 
diff --git a/nova/api/validation/extra_specs/quota.py b/nova/api/validation/extra_specs/quota.py
index f0ff3db2a677..4b640fa4d1ff 100644
--- a/nova/api/validation/extra_specs/quota.py
+++ b/nova/api/validation/extra_specs/quota.py
@@ -146,14 +146,12 @@ EXTRA_SPEC_VALIDATORS.extend(
 )
 
 
-# Disk quotas (libvirt, HyperV)
+# Disk quotas (libvirt)
 for stat in ('read', 'write', 'total'):
     for metric in ('bytes', 'iops'):
         EXTRA_SPEC_VALIDATORS.append(
             base.ExtraSpecValidator(
                 name=f'quota:disk_{stat}_{metric}_sec',
-                # NOTE(stephenfin): HyperV supports disk_total_{metric}_sec
-                # too; update
                 description=(
                     f'The quota {stat} {metric} for disk. '
                     f'Only supported by the libvirt virt driver.'
diff --git a/nova/tests/unit/api/validation/extra_specs/test_validators.py b/nova/tests/unit/api/validation/extra_specs/test_validators.py
index a8911aadadbd..e639c02407a4 100644
--- a/nova/tests/unit/api/validation/extra_specs/test_validators.py
+++ b/nova/tests/unit/api/validation/extra_specs/test_validators.py
@@ -105,8 +105,6 @@ class TestValidators(test.NoDBTestCase):
     def test_value__int(self):
         valid_specs = (
             ('hw:numa_nodes', '1'),
-            ('os:monitors', '1'),
-            ('os:monitors', '8'),
         )
         for key, value in valid_specs:
             validators.validate(key, value)
@@ -115,8 +113,6 @@ class TestValidators(test.NoDBTestCase):
             ('hw:serial_port_count', 'five'),  # NaN
             ('hw:serial_port_count', '!'),  # NaN
             ('hw:numa_nodes', '0'),  # has min
-            ('os:monitors', '0'),  # has min
-            ('os:monitors', '9'),  # has max
         )
         for key, value in invalid_specs:
             with testtools.ExpectedException(exception.ValidationError):
diff --git a/releasenotes/notes/remove-hyperv-94d5bfd8a539fe9f.yaml b/releasenotes/notes/remove-hyperv-94d5bfd8a539fe9f.yaml
index 99e0a0239e30..38fd5685d831 100644
--- a/releasenotes/notes/remove-hyperv-94d5bfd8a539fe9f.yaml
+++ b/releasenotes/notes/remove-hyperv-94d5bfd8a539fe9f.yaml
@@ -45,3 +45,10 @@ upgrade:
     * ``[hyperv] iscsi_initiator_list``
     * ``[rdp] enabled``
     * ``[rdp] html5_proxy_base_url``
+
+    The following extra specs which only apply for the ``HyperV`` virt
+    driver have been removed.
+
+    * ``os:resolution``
+    * ``os:monitors``
+    * ``os:vram``