2 files changed, 1 insertions, 3 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 7bc11f736f..3f5d1d701f 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -17,7 +17,6 @@
 
 import logging
 from http import HTTPStatus
-from queue import Empty, PriorityQueue
 from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Tuple, Union
 
 from signedjson.key import decode_verify_key_bytes
@@ -57,7 +56,6 @@ from synapse.replication.http.federation import (
     ReplicationCleanRoomRestServlet,
     ReplicationStoreRoomOnOutlierMembershipRestServlet,
 )
-from synapse.storage.databases.main.event_federation import BackfillQueueNavigationItem
 from synapse.storage.databases.main.events_worker import EventRedactBehaviour
 from synapse.types import JsonDict, StateMap, get_domain_from_id
 from synapse.util.async_helpers import Linearizer
diff --git a/synapse/handlers/federation_event.py b/synapse/handlers/federation_event.py
index 6952c879a8..2be3ef89a3 100644
--- a/synapse/handlers/federation_event.py
+++ b/synapse/handlers/federation_event.py
@@ -72,7 +72,7 @@ from synapse.types import (
     get_domain_from_id,
 )
 from synapse.util.async_helpers import Linearizer, concurrently_execute
-from synapse.util.iterutils import batch_iter, sorted_topologically
+from synapse.util.iterutils import batch_iter
 from synapse.util.retryutils import NotRetryingDestination
 from synapse.util.stringutils import shortstr