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

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: I7becb18c04854869b5b91b210505ec24a992b826

openstack/cloudkitty-dashboard,stackforge/cloudkitty-dashboard,openstack/cloudkitty-dashboard,stackforge/cloudkitty-dashboard,openstack/cloudkitty-dashboard,stackforge/cloudkitty-dashboard