Retire puppet-panko completely

puppet-panko was deprecated after wallaby release. Its last stable
branch, stable/wallaby, was EOLed when stable/wallaby was transitioned
to unmaitanined/wallaby[1].

[1] 1b1ef0546f8f148767ddacf46690c3011cab70c2

Change-Id: I6077cc1263b6d8e1a6f7701525e5c99bc64f3756

gerrit/projects.yaml

@@ -5109,7 +5109,8 @@
   description: RETIRED, Pacemaker Puppet Module
   acl-config: /home/gerrit2/acls/openstack/retired.config
 - project: openstack/puppet-panko
-  description: DEPRECATED, OpenStack Panko Puppet Module
+  description: RETIRED, OpenStack Panko Puppet Module
+  acl-config: /home/gerrit2/acls/openstack/retired.config
 - project: openstack/puppet-placement
   description: OpenStack Placement Puppet Module
   acl-config: /home/gerrit2/acls/openstack/puppet-modules.config

gerritbot/channels.yaml

@@ -1621,7 +1621,6 @@ puppet-openstack:
     - openstack/puppet-openstacklib
     - openstack/puppet-oslo
     - openstack/puppet-ovn
-    - openstack/puppet-panko
     - openstack/puppet-placement
     - openstack/puppet-swift
     - openstack/puppet-tempest

zuul.d/projects.yaml

@@ -3812,20 +3812,6 @@
       - official-openstack-repo-jobs
       - puppet-release-jobs
 
-- project:
-    name: openstack/puppet-panko
-    templates:
-      - official-openstack-repo-jobs
-      - publish-to-pypi-stable-only
-    check:
-      jobs:
-        - noop:
-            branches: master
-    gate:
-      jobs:
-        - noop:
-            branches: master
-
 - project:
     name: openstack/puppet-placement
     templates:

zuul/main.yaml

@@ -843,7 +843,6 @@
           - openstack/puppet-openstacklib
           - openstack/puppet-oslo
           - openstack/puppet-ovn
-          - openstack/puppet-panko
           - openstack/puppet-placement
           - openstack/puppet-swift
           - openstack/puppet-tempest