diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 294217cc23..9b17939163 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -42,7 +42,7 @@ from synapse.api.errors import (
SynapseError,
UnsupportedRoomVersionError,
)
-from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions
+from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
from synapse.api.urls import ConsentURIBuilder
from synapse.event_auth import validate_event_for_room_version
from synapse.events import EventBase, relation_from_event
@@ -1274,23 +1274,6 @@ class EventCreationHandler:
)
return prev_event
- if event.is_state() and (event.type, event.state_key) == (
- EventTypes.Create,
- "",
- ):
- room_version_id = event.content.get(
- "room_version", RoomVersions.V1.identifier
- )
- maybe_room_version_obj = KNOWN_ROOM_VERSIONS.get(room_version_id)
- if not maybe_room_version_obj:
- raise UnsupportedRoomVersionError(
- "Attempt to create a room with unsupported room version %s"
- % (room_version_id,)
- )
- room_version_obj = maybe_room_version_obj
- else:
- room_version_obj = await self.store.get_room_version(event.room_id)
-
if event.internal_metadata.is_out_of_band_membership():
# the only sort of out-of-band-membership events we expect to see here are
# invite rejections and rescinded knocks that we have generated ourselves.
@@ -1298,9 +1281,9 @@ class EventCreationHandler:
assert event.content["membership"] == Membership.LEAVE
else:
try:
- validate_event_for_room_version(room_version_obj, event)
+ validate_event_for_room_version(event)
await self._event_auth_handler.check_auth_rules_from_context(
- room_version_obj, event, context
+ event, context
)
except AuthError as err:
logger.warning("Denying new event %r because %s", event, err)
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