Remove travis.yml
Remove travis.yml

It's been a long time since we used Travis for testing.

Change-Id: I3b352d40f8186a6ae60a07ce1d14c349516381e2
Signed-off-by: Stephen Finucane <492121341a95b3c3aab646bed44634f739dd019b@redhat.com>

dtroyer/cliff,openstack/cliff,openstack/cliff,dtroyer/cliff