code: def delete(self, image):
          
          from .entity import Image
          if not isinstance(image, Image):
              raise TypeError('image must be a sqlalchemy_imageattach.entity.'
                              'Image instance, not ' + repr(image))
          self.delete_file(image.object_type, image.object_id,
                           image.width, image.height, image.mimetype)
docs: Delete the file of the given ``image``.
  
          :param image: the image to delete
          :type image: :class:`sqlalchemy_imageattach.entity.Image`