Drop MANIFEST.in - it's not needed by pbr
Drop MANIFEST.in - it's not needed by pbr

yaql 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: I92c00f0068de48b8d33307367e260e583e27a4f1
Closes-Bug:#1608980

openstack/yaql,stackforge/yaql