There's no need to have an outdated translation file checked in.
For translations, the full file would be needed which can easily be
generated.
Also update setup.cfg so that - if needed in the future - translations
are used, they follow the OpenStack CI setup as explained in
the spec:
http://specs.openstack.org/openstack-infra/infra-specs/specs/translation_setup.html
Change-Id: I9063faec413f27d6f7312e9403fdf4d14a379d1b