craton already uses PBR:-
setuptools.setup(
setup_requires=['pbr'],
pbr=True)
This patch removes `MANIFEST.in` file as pbr generates a
sensible manifest from git files and some standard files
and it removes the need for an explicit `MANIFEST.in` file.
Change-Id: I52408a14c7e901e36b6a1d79ec2058d2c8e4dcd6
Closes-Bug: #1608980