Remove the experimental implementation of MSC3772. (#14094)

MSC3772 has been abandoned.

1 files changed, 0 insertions, 3 deletions

diff --git a/synapse/storage/databases/main/cache.py b/synapse/storage/databases/main/cache.py

index 3b8ed1f7ee..a9f25a5904 100644
--- a/synapse/storage/databases/main/cache.py
+++ b/synapse/storage/databases/main/cache.py
@@ -259,9 +259,6 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
             self._attempt_to_invalidate_cache("get_applicable_edit", (relates_to,))
             self._attempt_to_invalidate_cache("get_thread_summary", (relates_to,))
             self._attempt_to_invalidate_cache("get_thread_participated", (relates_to,))
-            self._attempt_to_invalidate_cache(
-                "get_mutual_event_relations_for_rel_type", (relates_to,)
-            )
 
     async def invalidate_cache_and_stream(
         self, cache_name: str, keys: Tuple[Any, ...]