Remove branch heat-tempest-plugin

We need to remove branchs as that will lead to confuse user to
adopt branch and wait for new branch for tests. As we not actually
release anything (the default 0.1.0 was not actually released in
pypi), we should just remove it while we not in some `history`
status.

Change-Id: I14432e8c4c4ee5bf37b67877e8082fe47c4f96cb

deliverables/_independent/heat-tempest-plugin.yaml

@@ -1,12 +0,0 @@
----
-launchpad: heat
-team: heat
-type: other
-include-pypi-link: yes
-releases:
-  - version: 0.1.0
-    projects:
-      - repo: openstack/heat-tempest-plugin
-        hash: 7fa633b373267cb8475d47d9dc7a024fb61bd344
-repository-settings:
-  openstack/heat-tempest-plugin: {}