Remove DevStack CentOS 7 jobs

Change-Id: I631817cda0086c50a7d4a5e16709f7c1b1919ee0

zuul.d/devstack.yaml

@@ -141,14 +141,6 @@
       - ^tobiko/tests/unit/
 
 
-- job:
-    name: tobiko-devstack-functional-centos-7
-    parent: tobiko-devstack-functional
-    nodeset: devstack-single-node-centos-7
-    override-checkout: stable/train
-    voting: false
-
-
 - job:
     name: tobiko-devstack-functional-centos-8
     parent: tobiko-devstack-functional
@@ -213,22 +205,6 @@
       - ^tobiko/tests/unit/
 
 
-- job:
-    name: tobiko-devstack-faults-centos-7
-    parent: tobiko-devstack-faults
-    nodeset: openstack-three-node-centos-7
-    override-checkout: stable/train
-    voting: false
-    vars:
-      devstack_services:
-        # Disable Octavia services
-        octavia: false
-        o-cw: false
-        o-hk: false
-        o-hm: false
-        o-api: false
-
-
 - job:
     name: tobiko-devstack-faults-centos-8
     parent: tobiko-devstack-faults
@@ -236,13 +212,6 @@
     voting: false
 
 
-- job:
-    name: tobiko-devstack-faults-centos-7-queens
-    parent: tobiko-devstack-faults-centos-7
-    override-checkout: stable/queens
-    voting: false
-
-
 - job:
     name: tobiko-devstack-faults-ubuntu-bionic
     parent: tobiko-devstack-faults

zuul.d/project.yaml

@@ -14,10 +14,8 @@
     check:
       jobs:
         - tobiko-tox-py38-centos-8
-        - tobiko-devstack-functional-centos-7
         - tobiko-devstack-functional-centos-8
         - tobiko-devstack-functional-ubuntu-bionic
-        - tobiko-devstack-faults-centos-7
         - tobiko-devstack-faults-centos-8
         - tobiko-devstack-faults-ubuntu-bionic
         - tobiko-tox-infrared-centos-7