identity: Remove unused helper

This has been unused since I71b5ae8a4bbcb2fdebf894d8bd5cc8322c31bdb5.

Change-Id: Ic90e48868d3e4c79b262d0e127f1b38dc7d840dc
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

Author: stephenfin

openstackclient/identity/common.py

@@ -33,17 +33,6 @@
 from openstackclient.i18n import _
 
 
-def find_service_in_list(service_list: list[Any], service_id: str) -> Any:
-    """Find a service by id in service list."""
-
-    for service in service_list:
-        if service.id == service_id:
-            return service
-    raise exceptions.CommandError(
-        f"No service with a type, name or ID of '{service_id}' exists."
-    )
-
-
 def find_service(identity_client: Any, name_type_or_id: str) -> Any:
     """Find a service by id, name or type."""