remove job settings for senlin repositories
remove job settings for senlin repositories

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

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

Change-Id: Idec4585c66d1c11bd02cab753ca4057a346938fd
Story: #2002586
Task: #24334

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