Some cleanups to device inbox store. (#9041)

1 files changed, 0 insertions, 8 deletions

diff --git a/synapse/replication/slave/storage/deviceinbox.py b/synapse/replication/slave/storage/deviceinbox.py
index 5b045bed02..62b68dd6e9 100644
--- a/synapse/replication/slave/storage/deviceinbox.py
+++ b/synapse/replication/slave/storage/deviceinbox.py
@@ -18,7 +18,6 @@ from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
 from synapse.replication.tcp.streams import ToDeviceStream
 from synapse.storage.database import DatabasePool
 from synapse.storage.databases.main.deviceinbox import DeviceInboxWorkerStore
-from synapse.util.caches.expiringcache import ExpiringCache
 from synapse.util.caches.stream_change_cache import StreamChangeCache
 
 
@@ -37,13 +36,6 @@ class SlavedDeviceInboxStore(DeviceInboxWorkerStore, BaseSlavedStore):
             self._device_inbox_id_gen.get_current_token(),
         )
 
-        self._last_device_delete_cache = ExpiringCache(
-            cache_name="last_device_delete_cache",
-            clock=self._clock,
-            max_len=10000,
-            expiry_ms=30 * 60 * 1000,
-        )
-
     def process_replication_rows(self, stream_name, instance_name, token, rows):
         if stream_name == ToDeviceStream.NAME:
             self._device_inbox_id_gen.advance(instance_name, token)