Remove version from setup.py
Remove version from setup.py

To better integrate with new release management infra.

As per http://lists.openstack.org/pipermail/openstack-dev/2015-December/081431.html

Depends-On: I52cd0e7583d224cf99922845f947824179debe7b
Change-Id: I74840a0c846fe9c406bcd13a28da64da9d6986b2

stackforge/akanda-neutron,openstack/akanda-neutron