Drop CI jobs for unmaintained OpenStack versions

Author: mandre

.github/workflows/with-defaults.yml

@@ -20,18 +20,6 @@ jobs:
           - name: "zed"
             openstack_version: "stable/zed"
             ubuntu_version: "20.04"
-          - name: "yoga"
-            openstack_version: "stable/yoga"
-            ubuntu_version: "20.04"
-          - name: "xena"
-            openstack_version: "stable/xena"
-            ubuntu_version: "20.04"
-          - name: "wallaby"
-            openstack_version: "stable/wallaby"
-            ubuntu_version: "20.04"
-          - name: "victoria"
-            openstack_version: "stable/victoria"
-            ubuntu_version: "20.04"
     runs-on: ubuntu-${{ matrix.ubuntu_version }}
     name: A job to deploy devstack with defaults
     steps: