1 files changed, 1 insertions, 3 deletions
diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py
index a956be491a..ff81d5cd17 100644
--- a/synapse/storage/databases/main/event_federation.py
+++ b/synapse/storage/databases/main/event_federation.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,7 +14,7 @@
import itertools
import logging
from queue import Empty, PriorityQueue
-from typing import Dict, Iterable, List, Set, Tuple
+from typing import Collection, Dict, Iterable, List, Set, Tuple
from synapse.api.errors import StoreError
from synapse.events import EventBase
@@ -26,7 +25,6 @@ from synapse.storage.databases.main.events_worker import EventsWorkerStore
from synapse.storage.databases.main.signatures import SignatureWorkerStore
from synapse.storage.engines import PostgresEngine
from synapse.storage.types import Cursor
-from synapse.types import Collection
from synapse.util.caches.descriptors import cached
from synapse.util.caches.lrucache import LruCache
from synapse.util.iterutils import batch_iter
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