Remove the tag from the photo must be a Tag object.
        (flickr.photos.removeTag)

def removeTag(self, tag):
        """Remove the tag from the photo must be a Tag object.
        (flickr.photos.removeTag)
        """
        method = 'flickr.photos.removeTag'
        tag_id = ''
        try:
            tag_id = tag.id
        except AttributeError:
            raise FlickrError, "Tag object expected"
        _dopost(method, auth=True, photo_id=self.id, tag_id=tag_id)
        self._load_properties()