diff --git a/doc/source/conf.py b/doc/source/conf.py
index 2a27f04ffe6..7f6aa2a5ba4 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2010 OpenStack Foundation.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index fd71dbb16d6..510739e08a4 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at