wheel-build: remove centos-7-arm jobs

Following on from Iebb1062269011664411691ef8fd55219afaccd1e; there are
no arm64 CentOS 7 nodes, so this will not work right now and prevent
publishing.  We can restore this if we feel we need it after making
such nodes.

Change-Id: Ib54c2612c675ad6b161109ed2a281d440512bcc7

zuul.d/jobs.yaml

@@ -860,31 +860,6 @@
       - name: afs
         secret: wheel_keytab
 
-- job:
-    name: build-wheel-mirror-centos-7-arm64
-    parent: build-wheel-mirror-base
-    description: |
-      Build CentOS 7 wheels for OpenStack CI mirrors.
-    nodeset:
-      nodes:
-        - name: wheel-mirror-centos-7-arm64-python2
-          label: centos-7-arm64
-    host-vars:
-      wheel-mirror-centos-7-arm64-python2:
-        wheel_python: python2
-
-- job:
-    name: publish-wheel-mirror-centos-7-arm64
-    description: |
-      Publish CentOS 7 wheels for OpenStack CI mirrors.
-    parent: build-wheel-mirror-centos-7-arm64
-    pre-run: playbooks/openafs-client/setup.yaml
-    post-run: playbooks/publish/wheel-mirror.yaml
-    final: true
-    secrets:
-      - name: afs
-        secret: wheel_keytab
-
 - job:
     name: build-wheel-mirror-centos-8
     parent: build-wheel-mirror-base

zuul.d/projects.yaml

@@ -5456,7 +5456,6 @@
         - publish-wheel-mirror-ubuntu-focal
         - publish-wheel-mirror-ubuntu-bionic
         - publish-wheel-mirror-ubuntu-xenial
-        - publish-wheel-mirror-centos-7-arm64
         - publish-wheel-mirror-centos-8-arm64
         - publish-wheel-mirror-debian-buster-arm64
         - publish-wheel-mirror-ubuntu-focal-arm64
@@ -5470,7 +5469,6 @@
               - publish-wheel-mirror-ubuntu-focal
               - publish-wheel-mirror-ubuntu-bionic
               - publish-wheel-mirror-ubuntu-xenial
-              - publish-wheel-mirror-centos-7-arm64
               - publish-wheel-mirror-centos-8-arm64
               - publish-wheel-mirror-debian-buster-arm64
               - publish-wheel-mirror-ubuntu-focal-arm64