Revert "ensure-molecule: add test jobs."

This reverts commit e20c4ca705.

Change-Id: Ic261f3a708d55531e4d706b41c4e9bc34816e6ba

playbooks/ensure-molecule/run.yaml

@@ -1,4 +0,0 @@
----
-- hosts: localhost
-  roles:
-    - ensure-molecule

zuul.d/jobs.yaml

@@ -1,10 +1,4 @@
 ---
-- job:
-    name: base-jobs-ensure-molecule
-    run: playbooks/ensure-molecule/run.yaml
-    nodeset:
-      nodes: []
-
 - job:
     name: vexxhost-tox-molecule
     parent: tox

zuul.d/project.yaml

@@ -2,7 +2,7 @@
 - project:
     check:
       jobs:
-        - base-jobs-ensure-molecule
+        - noop
     gate:
       jobs:
-        - base-jobs-ensure-molecule
+        - noop