Updated openstack/openstack
Project: openstack/nova  77840f614d9c8e4cb43f75eec679f60e0bdd2da2

libvirt: Remove dated docstring

The docstring is out of date, we can update it or remove it.
The libvirt_opts includes all the details, so remove it.

Change-Id: Ia903ff71509b4228faf0580893c4720b5d8b9c61