docs: def DeleteSignedBinaryReferences(self,
                                     binary_id,
                                     cursor=None):
      """Deletes blob references for the given signed binary from the DB."""
      cursor.execute(
          """
        DELETE FROM signed_binary_references
        WHERE binary_type = %s AND binary_path_hash = %s
      """, [
          binary_id.binary_type.SerializeToDataStore(),
          mysql_utils.Hash(binary_id.path)
      ])