Move planet unittests in-tree
These jobs are in-tree now, remove them.
Depends-On:
name: openstack/openstack-planet
templates:
- system-required
- check:
- jobs:
- - legacy-openstack-planet-unittest
- gate:
- jobs:
- - legacy-openstack-planet-unittest
- project:
name: openstack/openstack-resource-agents
