fix compile error on win

Zhao Yuhang

2023-12-22 0cedc474f38dca024f77ebf1d7ac5bf22c19744a

 examples/shared/widgetframe/windowbutton.cpp

@@ -6,11 +6,9 @@

namespace QWK {

    WindowButtonPrivate::WindowButtonPrivate() {
    }
    WindowButtonPrivate::WindowButtonPrivate() = default;

    WindowButtonPrivate::~WindowButtonPrivate() {
    }
    WindowButtonPrivate::~WindowButtonPrivate() = default;

    void WindowButtonPrivate::init() {
    }