Remove version from setup.cfg
Remove version from setup.cfg

The release process has changed for Mitaka. Please see the mailing
list for details:

http://lists.openstack.org/pipermail/openstack-dev/2015-November/080692.html

Change-Id: I13fa7d296947168ffd985390d4d03edf941691bd
Depends-On: I5100cc67ef180acb16bbbd47e65b15eaf26065d3

openstack/barbican,openstack/barbican