diff --git a/codegenerator/openapi/nova.py b/codegenerator/openapi/nova.py
index f12b0a1..5acc0d6 100644
--- a/codegenerator/openapi/nova.py
+++ b/codegenerator/openapi/nova.py
@@ -504,12 +504,6 @@ class NovaGenerator(OpenStackServerSourceBase):
                 name, TypeSchema(**nova_schemas.SERVER_TOPOLOGY_SCHEMA)
             )
             ref = f"#/components/schemas/{name}"
-        elif name == "ServersOs_Security_GroupsListResponse":
-            schema = openapi_spec.components.schemas.setdefault(
-                name,
-                TypeSchema(**nova_schemas.SERVER_SECURITY_GROUPS_LIST_SCHEMA),
-            )
-            ref = f"#/components/schemas/{name}"
         elif name in [
             "ServersTagsListResponse",
             "ServersTagsUpdate_All",
diff --git a/codegenerator/openapi/nova_schemas.py b/codegenerator/openapi/nova_schemas.py
index c40a614..045c476 100644
--- a/codegenerator/openapi/nova_schemas.py
+++ b/codegenerator/openapi/nova_schemas.py
@@ -1980,61 +1980,6 @@ SERVER_PASSWORD_SCHEMA: dict[str, Any] = {
         }
     },
 }
-SERVER_SECURITY_GROUPS_LIST_SCHEMA: dict[str, Any] = {
-    "type": "object",
-    "properties": {
-        "security_groups": {
-            "type": "array",
-            "items": {
-                "type": "object",
-                "properties": {
-                    "id": {
-                        "type": "string",
-                        "format": "uuid",
-                        "description": "The ID of the security group.",
-                    },
-                    "name": {
-                        "type": "string",
-                        "description": "The security group name.",
-                    },
-                    "description": {
-                        "type": "string",
-                        "description": "Security group description.",
-                    },
-                    "tenant_id": {
-                        "type": "string",
-                        "format": "uuid",
-                        "description": "The UUID of the tenant in a multi-tenancy cloud.",
-                    },
-                    "rules": {
-                        "type": "array",
-                        "description": "The list of security group rules.",
-                        "items": {
-                            "type": "object",
-                            "properties": {
-                                "id": {"type": "string", "format": "uuid"},
-                                "from_port": {"type": "integer"},
-                                "to_port": {"type": "integer"},
-                                "ip_protocol": {"type": "string"},
-                                "ip_range": {"type": "object"},
-                                "group": {
-                                    "type": "object",
-                                    "properties": {"name": {"type": "string"}},
-                                },
-                                "parent_group_id": {
-                                    "type": "string",
-                                    "format": "uuid",
-                                },
-                            },
-                        },
-                    },
-                },
-                "required": ["id", "name"],
-            },
-        }
-    },
-}
-
 
 VOLUME_ATTACHMENT_SCHEMA: dict[str, Any] = {
     "type": "object",