code: public void removeAppender(Appender appender) throws IllegalArgumentException {
          if (appender == null) {
              throw new IllegalArgumentException("The appender must not be null.");
          }
  
          if (appender.isLogOpen()) {
              try {
                  appender.close();
              } catch (IOException e) {
                  Log.e(TAG, "Failed to close appender. " + e);
              }
          }
          appenderList.remove(appender);
      }
docs: Remove the specified appender from the appender list.
  
  @param appender the <code>Appender</code> to remove.