Remove leftover glance-registry service file
Remove leftover glance-registry service file

In Iae4a98b82cf888a0bb3af23f944c899625ba165c the glance-registry
service was removed, but the corresponding service file was not
deleted.

Change-Id: Ic5f44fe8c42e339281a5f42f2df9f6f3ec7c1bd3

openstack/rpm-packaging,openstack/rpm-packaging