diff --git a/synapse/storage/data_stores/main/events.py b/synapse/storage/data_stores/main/events.py
index 3a9b6bed4..a71d7346d 100644
--- a/synapse/storage/data_stores/main/events.py
+++ b/synapse/storage/data_stores/main/events.py
@@ -1512,8 +1512,7 @@ class EventsStore(
         logger.info("[purge] finding state groups referenced by deleted events")
 
         # Get all state groups that are referenced by events that are to be
-        # deleted. We then go and check if they are referenced by other events
-        # or state groups, and if not we delete them.
+        # deleted.
         txn.execute(
             """
             SELECT DISTINCT state_group FROM events_to_purge