diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py
index f9032e3697..c8b52cbc7a 100644
--- a/synapse/events/__init__.py
+++ b/synapse/events/__init__.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2019 New Vector Ltd
# Copyright 2020 The Matrix.org Foundation C.I.C.
diff --git a/synapse/events/builder.py b/synapse/events/builder.py
index c1c0426f6e..5793553a88 100644
--- a/synapse/events/builder.py
+++ b/synapse/events/builder.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/synapse/events/presence_router.py b/synapse/events/presence_router.py
index 24cd389d80..6c37c8a7a4 100644
--- a/synapse/events/presence_router.py
+++ b/synapse/events/presence_router.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2021 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/synapse/events/snapshot.py b/synapse/events/snapshot.py
index 7295df74fe..f8d898c3b1 100644
--- a/synapse/events/snapshot.py
+++ b/synapse/events/snapshot.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/synapse/events/spamcheck.py b/synapse/events/spamcheck.py
index b5a9c71ee6..4e8ea84f92 100644
--- a/synapse/events/spamcheck.py
+++ b/synapse/events/spamcheck.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2017 New Vector Ltd
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
@@ -16,12 +15,11 @@
import inspect
import logging
-from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union
+from typing import TYPE_CHECKING, Any, Collection, Dict, List, Optional, Tuple, Union
from synapse.rest.media.v1._base import FileInfo
from synapse.rest.media.v1.media_storage import ReadableFileWrapper
from synapse.spam_checker_api import RegistrationBehaviour
-from synapse.types import Collection
from synapse.util.async_helpers import maybe_awaitable
if TYPE_CHECKING:
diff --git a/synapse/events/third_party_rules.py b/synapse/events/third_party_rules.py
index 9767d23940..f7944fd834 100644
--- a/synapse/events/third_party_rules.py
+++ b/synapse/events/third_party_rules.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index 7050f0c885..ec96999e4e 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/synapse/events/validator.py b/synapse/events/validator.py
index f8f3b1a31e..fa6987d7cb 100644
--- a/synapse/events/validator.py
+++ b/synapse/events/validator.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
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