Remove dev heat coverage jobs.

Conform!

Change-Id: Ie70479eac228ef80bb17f106cf9f84a9b4d1dec4
Reviewed-on: https://review.openstack.org/31303
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Clint Byrum <clint@ubuntu.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins