Remove QT_{BEGIN,END}_HEADER macro usage

The macro was made empty in qtbase/ba3dc5f3b56d1fab6fe37fe7ae08096d7dc68bcb
and is no longer necessary or used.

Discussed-on: http://lists.qt-project.org/pipermail/development/2013-January/009284.html
Change-Id: Id95d10f5d9c146d9eb496119af6a8b8501ffcb17
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>

src/multimedia/qtmultimediaquicktools_headers/qsgvideonode_p.h

@@ -49,8 +49,6 @@
 #include <QtMultimedia/qvideosurfaceformat.h>
 #include <QtGui/qopenglfunctions.h>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 const QLatin1String QSGVideoNodeFactoryPluginKey("sgvideonodes");
@@ -92,6 +90,4 @@ public:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QSGVIDEONODE_H

src/multimedia/qtmultimediaquicktools_headers/qtmultimediaquickdefs_p.h

@@ -55,8 +55,6 @@
 
 #include <QtCore/qglobal.h>
 
-QT_BEGIN_HEADER
-
 #ifndef QT_STATIC
 #    if defined(QT_BUILD_QTMM_QUICK_LIB)
 #        define Q_MULTIMEDIAQUICK_EXPORT Q_DECL_EXPORT
@@ -67,8 +65,6 @@ QT_BEGIN_HEADER
 #    define Q_MULTIMEDIAQUICK_EXPORT
 #endif
 
-QT_END_HEADER
-
 
 #endif // QMULTIMEDIAQUICKDEFS_P_H