Remove oslo-cookiecutter legacy job
The job has moved in-tree, remove it.
Depends-On:
name: openstack-dev/oslo-cookiecutter
templates:
- system-required
- check:
- jobs:
- - legacy-oslo-cookiecutter-tox-cookiecutter
- gate:
- jobs:
- - legacy-oslo-cookiecutter-tox-cookiecutter
- project:
name: openstack-dev/pbr
