Stop some guide translations
Stop some guide translations

admin-guide will soon be removed, let's stop translation now. We can
remove the entry once the guide gets removed.

arch-design is deprecated, no need to translate.

Remove config-reference and networking-guide, they are already deleted.

Change-Id: Ia33713109091dca6c043da18a5c48385b020f802

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals