diff --git a/nova/api/openstack/compute/quota_sets.py b/nova/api/openstack/compute/quota_sets.py
index 616486c3aebb..0cc5912eef0a 100644
--- a/nova/api/openstack/compute/quota_sets.py
+++ b/nova/api/openstack/compute/quota_sets.py
@@ -172,12 +172,6 @@ class QuotaSetsController(wsgi.Controller):
 
         quota_set = body['quota_set']
 
-        # NOTE(stephenfin): network quotas were only used by nova-network and
-        # therefore should be explicitly rejected
-        if 'networks' in quota_set:
-            raise webob.exc.HTTPBadRequest(
-                explanation=_('The networks quota has been removed'))
-
         force_update = strutils.bool_from_string(quota_set.get('force',
                                                                'False'))
         settable_quotas = QUOTAS.get_settable_quotas(context, project_id,
diff --git a/nova/api/openstack/compute/schemas/quota_classes.py b/nova/api/openstack/compute/schemas/quota_classes.py
index 7410a95a2c4e..e1cf37a3e67d 100644
--- a/nova/api/openstack/compute/schemas/quota_classes.py
+++ b/nova/api/openstack/compute/schemas/quota_classes.py
@@ -35,7 +35,6 @@ del update_v250['properties']['quota_class_set']['properties'][
     'security_groups']
 del update_v250['properties']['quota_class_set']['properties'][
     'security_group_rules']
-del update_v250['properties']['quota_class_set']['properties']['networks']
 
 # 2.57 builds on 2.50 and removes injected_file* quotas.
 update_v257 = copy.deepcopy(update_v250)
@@ -65,13 +64,15 @@ _quota_response = {
         'instances': {'type': 'integer', 'minimum': -1},
         'key_pairs': {'type': 'integer', 'minimum': -1},
         'metadata_items': {'type': 'integer', 'minimum': -1},
-        'networks': {'type': 'integer', 'minimum': -1},
+        # NOTE(stephenfin): We previously has a 'networks' key but this was
+        # removed in Train [1]. If we end up needing this for clients, we can
+        # re-add it.
+        # [1] I352b71b5976d008c2b8fab8a6d6939c0e0b305be
         'ram': {'type': 'integer', 'minimum': -1},
         'security_groups': {'type': 'integer', 'minimum': -1},
         'security_group_rules': {'type': 'integer', 'minimum': -1},
     },
     'required': [
-        # only networks is optional (it only appears under nova-network)
         'cores',
         'fixed_ips',
         'floating_ips',
diff --git a/nova/api/openstack/compute/schemas/quota_sets.py b/nova/api/openstack/compute/schemas/quota_sets.py
index 6dca6c8fb379..0757c44719c9 100644
--- a/nova/api/openstack/compute/schemas/quota_sets.py
+++ b/nova/api/openstack/compute/schemas/quota_sets.py
@@ -33,6 +33,10 @@ _quota_resources = {
     'floating_ips': _common_quota,
     'fixed_ips': _common_quota,
     'metadata_items': _common_quota,
+    # NOTE(stephenfin): We previously has a 'networks' key but this was
+    # removed in Train [1]. If we end up needing this for clients, we can
+    # re-add it.
+    # [1] I352b71b5976d008c2b8fab8a6d6939c0e0b305be
     'key_pairs': _common_quota,
     'security_groups': _common_quota,
     'security_group_rules': _common_quota,
@@ -41,9 +45,6 @@ _quota_resources = {
     'injected_file_path_bytes': _common_quota,
     'server_groups': _common_quota,
     'server_group_members': _common_quota,
-    # NOTE(stephenfin): This will always be rejected since it was nova-network
-    # only, but we need to allow users to submit it at a minimum
-    'networks': _common_quota
 }
 
 _update_quota_set = copy.deepcopy(_quota_resources)
@@ -54,7 +55,6 @@ del _update_quota_set_v236['fixed_ips']
 del _update_quota_set_v236['floating_ips']
 del _update_quota_set_v236['security_groups']
 del _update_quota_set_v236['security_group_rules']
-del _update_quota_set_v236['networks']
 
 _update_quota_set_v257 = copy.deepcopy(_update_quota_set_v236)
 del _update_quota_set_v257['injected_files']
@@ -123,7 +123,10 @@ _quota_response = {
         'instances': {'type': 'integer', 'minimum': -1},
         'key_pairs': {'type': 'integer', 'minimum': -1},
         'metadata_items': {'type': 'integer', 'minimum': -1},
-        'networks': {'type': 'integer', 'minimum': -1},
+        # NOTE(stephenfin): We previously has a 'networks' key but this was
+        # removed in Train [1]. If we end up needing this for clients, we can
+        # re-add it.
+        # [1] I352b71b5976d008c2b8fab8a6d6939c0e0b305be
         'ram': {'type': 'integer', 'minimum': -1},
         'security_groups': {'type': 'integer', 'minimum': -1},
         'security_group_rules': {'type': 'integer', 'minimum': -1},
@@ -131,7 +134,6 @@ _quota_response = {
         'server_group_members': {'type': 'integer', 'minimum': -1},
     },
     'required': [
-        # only networks is optional (it only appears under nova-network)
         'cores',
         'fixed_ips',
         'floating_ips',