remove job settings for Release Management repositories
remove job settings for Release Management repositories

This is a mechanically generated patch to remove the job settings that
have been migrated to the git repositories owned by the Release Management team.

See the python3-first goal document for details:
https://governance.openstack.org/tc/goals/stein/python3-first.html

Change-Id: I626107844856d8e3116a74e5ce7dbb3bca838524
Story: #2002586
Task: #24330

openstack-infra/project-config,openstack-infra/project-config