Removes unnecessary utf-8 encoding

This patches removes unnecessary utf-8
encoding in doc/source/conf.py

Change-Id: I52a2148d4668b7af05acbc7c4e27ffdd86c838f4
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 77b483b..ed05ed7 100755
--- a/doc/source/conf.py
+++ b/doc/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