lxc: remove migrate_to and migrate_from
lxc: remove migrate_to and migrate_from

No need to keep these functions around if they don't do anything other
than what the cluster manager would do anyway.

stevenraspudic/resource-agents,asp24/resource-agents,asp24/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents