'Deletes a consistency group.'

def delete_consistencygroup(self, context, group, volumes):

    self.proxy.destroy_group(group)
    volume_updates = []
    for volume in volumes:
        self.delete_volume(volume)
        volume_updates.append({'id': volume.id, 'status': 'deleted'})
    model_update = {'status': group['status']}
    return (model_update, volume_updates)
