Replace Qt Windows Extras features with native ones

src/gui/torrentcontentmodel.cpp

@@ -37,7 +37,9 @@
 #if defined(Q_OS_WIN)
 #include <Windows.h>
 #include <Shellapi.h>
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
 #include <QtWin>
+#endif
 #else
 #include <QMimeDatabase>
 #include <QMimeType>
@@ -118,7 +120,11 @@ namespace
             if (FAILED(hr))
                 return {};
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+            auto iconPixmap = QPixmap::fromImage(QImage::fromHICON(sfi.hIcon));
+#else
             QPixmap iconPixmap = QtWin::fromHICON(sfi.hIcon);
+#endif
             ::DestroyIcon(sfi.hIcon);
             return iconPixmap;
         }