Remove python-jobs-trusty
Remove python-jobs-trusty

We don't run master on trusty anymore, remove the template. The projects
already have a python-jobs template, so will keep jobs running, just now
on newer Ubuntu.

Change-Id: Ia3bc80873dd58e9d78d280c855fb7fe05a1d9154

openstack-infra/project-config,openstack-infra/project-config