Remove centos-7 upgrade and update jobs

See topic branch [1] for related patches

[1] https://review.opendev.org/q/topic:tripleo-c7-update-upgrade-removal

Change-Id: I7792def11b29173e687e64f9286888adc221217d

zuul.d/layout.yaml

@@ -22,14 +22,8 @@
               - openstack-tox-py35
               - openstack-tox-py36
               - openstack-tox-py37
-        - tripleo-ci-centos-7-scenario000-multinode-oooq-container-upgrades:
-            dependencies: *deps_unit_lint
-        - tripleo-ci-centos-7-scenario000-multinode-oooq-container-updates:
-            dependencies: *deps_unit_lint
         - tripleo-ci-centos-7-scenario007-multinode-oooq-container:
             dependencies: *deps_unit_lint
-        - tripleo-ci-centos-7-standalone-upgrade:
-            dependencies: *deps_unit_lint
         - tripleo-ci-centos-7-scenario001-standalone:
             dependencies: *deps_unit_lint
         - tripleo-ci-centos-7-scenario002-standalone:
@@ -40,5 +34,3 @@
             dependencies: *deps_unit_lint
         - tripleo-ci-centos-7-scenario012-standalone:
             dependencies: *deps_unit_lint
-        - tripleo-ci-centos-7-containerized-undercloud-upgrades:
-            dependencies: *deps_unit_lint