remove not needed result

Yuhang Zhao

2023-12-07 86403b4e99f901f687050ce9a91a8e539331cebb

 examples/mainwindow/mainwindow.h

@@ -7,6 +7,9 @@
public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

protected:
    void installWindowAgent();
};

#endif // MAINWINDOW_H