Windows QPA plugin: Remove some duplicated declarations

Pick-to: 6.5
Task-number: QTBUG-109394
Change-Id: Ic132495da4bfc12ecf303d018fb4d9ba1c8a1128
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

src/plugins/platforms/windows/qwindowsdialoghelpers.cpp

@@ -60,14 +60,6 @@ static inline QString guidToString(const GUID &g)
         << "}};";
     return rc;
 }
-
-inline QDebug operator<<(QDebug d, const GUID &g)
-{
-    QDebugStateSaver saver(d);
-    d.nospace();
-    d << guidToString(g);
-    return d;
-}
 #endif // !QT_NO_DEBUG_STREAM
 
 // Return an allocated wchar_t array from a QString, reserve more memory if desired.

src/plugins/platforms/windows/qwindowsscreen.cpp

@@ -16,6 +16,8 @@
 #include <qpa/qwindowsysteminterface.h>
 #include <private/qhighdpiscaling_p.h>
 #include <private/qwindowsfontdatabasebase_p.h>
+#include <private/qpixmap_win_p.h>
+
 #include <QtGui/qscreen.h>
 
 #include <QtCore/qdebug.h>
@@ -270,8 +272,6 @@ QString QWindowsScreen::name() const
                : m_data.name;
 }
 
-Q_GUI_EXPORT QPixmap qt_pixmapFromWinHBITMAP(HBITMAP bitmap, int hbitmapFormat = 0);
-
 QPixmap QWindowsScreen::grabWindow(WId window, int xIn, int yIn, int width, int height) const
 {
     QSize windowSize;

src/plugins/platforms/windows/qwindowsservices.cpp

@@ -1,7 +1,6 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
-#define QT_NO_URL_CAST_FROM_STRING
 #include "qwindowsservices.h"
 #include <QtCore/qt_windows.h>