'Delete all LVM disks for given instance object.'

def _cleanup_lvm(self, instance, block_device_info):

    if (instance.get('ephemeral_key_uuid') is not None):
        self._detach_encrypted_volumes(instance, block_device_info)
    disks = self._lvm_disks(instance)
    if disks:
        lvm.remove_volumes(disks)
