These translation sections are not needed anymore, Babel can
generate translation files without them.
Remove babel.cfg as well, this is the default role and not needed
anymore. more info:
http://lists.openstack.org/pipermail/openstack-discuss/2020-April/014227.html
Change-Id: I814ea7e796fadf33fd2a761e8c2a2e3ef2b6c813