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-rw-r--r--synapse/storage/databases/main/events.py4
1 files changed, 0 insertions, 4 deletions
diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py
index ec8579b9ad..a396a201d4 100644
--- a/synapse/storage/databases/main/events.py
+++ b/synapse/storage/databases/main/events.py
@@ -2010,10 +2010,6 @@ class PersistEventsStore:
 
         Forward extremities are handled when we first start persisting the events.
         """
-        events_by_room: Dict[str, List[EventBase]] = {}
-        for ev in events:
-            events_by_room.setdefault(ev.room_id, []).append(ev)
-
         query = (
             "INSERT INTO event_backward_extremities (event_id, room_id)"
             " SELECT ?, ? WHERE NOT EXISTS ("