'Removes the specified volume from Cinder management.
Does not delete the underlying backend storage object.
For most drivers, this will not need to do anything.  However, some
drivers might use this call as an opportunity to clean up any
Cinder-specific configuration that they have associated with the
backend storage object.
:param volume: Cinder volume to unmanage'

@abc.abstractmethod
def unmanage(self, volume):

    pass
