Delete old job definitions

Delete old jobs which no longer need to be tested.

Depends-On: https://review.opendev.org/c/openinfra/refstack-client/+/880829
Change-Id: I312fda726d62811035564066f71fe47c4d3d38a8

.zuul.yaml

@@ -7,9 +7,6 @@
         - refstack-client-devstack-2023-1
         - refstack-client-devstack-zed
         - refstack-client-devstack-yoga
-        - refstack-client-devstack-xena
-        - refstack-client-devstack-wallaby
-        - refstack-client-devstack-victoria
     gate:
       jobs:
         - openstack-tox-linters
@@ -17,9 +14,6 @@
         - refstack-client-devstack-2023-1
         - refstack-client-devstack-zed
         - refstack-client-devstack-yoga
-        - refstack-client-devstack-xena
-        - refstack-client-devstack-wallaby
-        - refstack-client-devstack-victoria
 
 - job:
     name: refstack-client-devstack-master
@@ -104,28 +98,3 @@
     override-checkout: stable/yoga
     vars:
       branch: stable/yoga
-
-- job:
-    name: refstack-client-devstack-xena
-    parent: refstack-client-devstack-master
-    override-checkout: stable/xena
-    vars:
-      branch: stable/xena
-
-- job:
-    name: refstack-client-devstack-wallaby
-    parent: refstack-client-devstack-master
-    override-checkout: stable/wallaby
-    vars:
-      branch: stable/wallaby
-      devstack_localrc:
-        MANILA_INSTALL_TEMPEST_PLUGIN_SYSTEMWIDE: false
-
-- job:
-    name: refstack-client-devstack-victoria
-    parent: refstack-client-devstack-master
-    override-checkout: stable/victoria
-    vars:
-      branch: stable/victoria
-      devstack_localrc:
-        MANILA_INSTALL_TEMPEST_PLUGIN_SYSTEMWIDE: false