code: def delete_source(self, photo, **kwds):
          
          return self._client.post("/photo/%s/source/delete.json" %
                                   self._extract_id(photo),
                                   **kwds)["result"]
docs: Endpoint: /photo/<id>/source/delete.json
  
          Delete the source files of a photo.
          Returns True if successful.
          Raises a TroveboxError if not.