Remove unnecessary coding line

As per PEP 263, a Python file with non-ASCII characters must have a
line with "coding: <some-encoding>". This file is pure ASCII, so the
line is unnecessary here.

Change-Id: I1cade3ddc7ef9631a5230bd00bafc64979cbf80a

setup.py

@@ -1,5 +1,4 @@
 #!/usr/bin/python
-# -*- encoding: utf-8 -*-
 # Copyright (c) 2013 OpenStack, LLC.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");