docs: def image_meta_delete(self,
                            image_id=None,     # pylint: disable=C0103
                            name=None,
                            keys=None):
          '''
          Delete image metadata
          '''
          nt_ks = self.compute_conn
          if name:
              for image in nt_ks.images.list():
                  if image.name == name:
                      image_id = image.id  # pylint: disable=C0103
          pairs = keys.split(',')
          if not image_id:
              return {'Error': 'A valid image name or id was not specified'}
          nt_ks.images.delete_meta(image_id, pairs)
          return {image_id: 'Deleted: {0}'.format(pairs)}