Remove translation sections from setup.cfg

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.

Change-Id: I4d1665f1442b15c0efe3c9c8b04d0f5226902b0c

Author: ajaeger

babel.cfg

@@ -83,17 +83,3 @@ console_scripts =
 wsgi_scripts =
     nova-api-wsgi = nova.api.openstack.compute.wsgi:init_application
     nova-metadata-wsgi = nova.api.metadata.wsgi:init_application
-
-[compile_catalog]
-directory = nova/locale
-domain = nova
-
-[update_catalog]
-domain = nova
-output_dir = nova/locale
-input_file = nova/locale/nova.pot
-
-[extract_messages]
-keywords = _ gettext ngettext l_ lazy_gettext
-mapping_file = babel.cfg
-output_file = nova/locale/nova.pot