Remove .tx/config
Remove .tx/config

Since we switched from Transifex to Zanata, this file is not needed any
more. Remove it.

Change-Id: I2014e2b3a66955bea14b1dd6033405642f4a2653

openstack/openstack-manuals,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals