Don't run check-tripleo OVB jobs frm RH1 anymore

Jobs now run in RDO CI, we don't need RH1 cloud to run OVB jobs anymore.
We'll keep experimental jobs until a complete decomission.

Related-Bug: #1744763
Change-Id: I25dcc22563316e184577822609aa7457da1c1d12

zuul.d/layout.yaml

@@ -6,12 +6,6 @@
       - tripleo-undercloud-jobs
       - tripleo-multinode-baremetal-minimal
       - tripleo-multinode-container-minimal
-      - tripleo-ovb-experimental
-    check-tripleo:
-      jobs:
-        - tripleo-ci-centos-7-ovb-ha-oooq
-        - tripleo-ci-centos-7-ovb-containers-oooq
-        - tripleo-ci-centos-7-ovb-1ctlr_1comp_1ceph-featureset024
     check:
       jobs:
         - tripleo-ci-centos-7-3nodes-multinode