code: public void removeAppender(Appender appender) {
          boolean wasAttached = aai.isAttached(appender);
          if (wasAttached) {
              aai.removeAppender(appender);
              fireRemoveAppenderEvent(appender);
          }
      }
docs: Remove the appender passed as parameter form the list of appenders.
  
  @since 0.8.2