Stop publishing on release

We don't support these images, no need to waste CI resources on
them. More so if they might end up being faulty.

Change-Id: I3259c0736a296751129aa349e8d378c0123957e6

.zuul.d/centos.yaml

@@ -24,10 +24,6 @@
       jobs:
         - kolla-publish-centos8s-source-dockerhub
         - kolla-publish-centos8s-binary-dockerhub
-    release:
-      jobs:
-        - kolla-publish-centos8s-source-dockerhub
-        - kolla-publish-centos8s-binary-dockerhub
     experimental:
       jobs:
         - kolla-build-no-infra-wheels-centos8s-source

.zuul.d/debian.yaml

@@ -17,11 +17,6 @@
       jobs:
         - kolla-publish-debian-source-dockerhub
         - kolla-publish-debian-source-aarch64-dockerhub
-    release:
-      jobs:
-        - kolla-publish-debian-source-dockerhub
-        - kolla-publish-debian-source-aarch64-dockerhub
-        - kolla-publish-debian-binary-dockerhub
     experimental:
       jobs:
         - kolla-build-no-infra-wheels-debian-source

.zuul.d/ubuntu.yaml

@@ -31,10 +31,6 @@
       jobs:
         - kolla-publish-ubuntu-source-dockerhub
         - kolla-publish-ubuntu-binary-dockerhub
-    release:
-      jobs:
-        - kolla-publish-ubuntu-source-dockerhub
-        - kolla-publish-ubuntu-binary-dockerhub
     experimental:
       jobs:
         - kolla-build-no-infra-wheels-ubuntu-source