remove job settings for trove repositories
remove job settings for trove repositories

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

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

Change-Id: I26c6ba57e4d654867e87468b52265403d3ff44eb
Story: #2002586
Task: #24342

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