Stop pbr from writing ChangeLog and AUTHORS

setup.py

@@ -11,8 +11,14 @@ A collection of code quality tools:
 
 """
 
+import os
+
 from setuptools import setup
 
+# pbr does some things we don't need. Turn them off the only way pbr gives us.
+os.environ['SKIP_GENERATE_AUTHORS'] = '1'
+os.environ['SKIP_WRITE_GIT_CHANGELOG'] = '1'
+
 setup(
     setup_requires=['pbr>=1.9', 'setuptools>=17.1'],
     pbr=True,