code: public void deleteMessage(String id, String reservationId) throws IOException {
          deleteMessage(id, reservationId, null);
      }
docs: Deletes a Message from the queue.
  
  @param id The ID of the message to delete.
  @param reservationId Reservation Id of the message. Reserved message could not be deleted without reservation Id.
  
  @throws io.iron.ironmq.HTTPException If the IronMQ service returns a status other than 200 OK.
  @throws java.io.IOException If there is an error accessing the IronMQ server.