Remove legacy python-manilaclient jobs
These have been moved in-repo, remove them.
Needed-By:
- check-requirements
- release-notes-jobs
- publish-to-pypi
- check:
- jobs:
- - legacy-manilaclient-dsvm-neutron-functional
- - rally-dsvm-manila-multibackend:
- voting: false
- - rally-dsvm-manila-multibackend-no-ss:
- voting: false
- gate:
- jobs:
- - legacy-manilaclient-dsvm-neutron-functional
post:
jobs:
- openstack-tox-cover
