code: public void removeListener(Class<? extends Measurement> measurementType,
              Measurement.Listener listener) {
          Log.i(TAG, "Removing listener " + listener + " for " + measurementType);
          mNotifier.unregister(measurementType, listener);
      }
docs: Unregister a previously registered Measurement.Listener instance.
  
  When an application is no longer interested in receiving measurement
  updates (e.g. when it's pausing or exiting) it should unregister all
  previously registered listeners to save on CPU.
  
  @param measurementType The class of the requested Measurement
  (e.g. VehicleSpeed.class)
  @param listener The listener to remove.