diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index f038fb5578..153352d011 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -1019,15 +1019,6 @@ def strip_event(event: EventBase) -> JsonDict:
     Stripped state events can only have the `sender`, `type`, `state_key` and `content`
     properties present.
     """
-    # MSC4311: Ensure the create event is available on invites and knocks.
-    # TODO: Implement the rest of MSC4311
-    if (
-        event.room_version.msc4291_room_ids_as_hashes
-        and event.type == EventTypes.Create
-        and event.get_state_key() == ""
-    ):
-        return event.get_pdu_json()
-
     return {
         "type": event.type,
         "state_key": event.state_key,