Move QSurface destructor to qsurface.cpp

fa0407bdb5 moved all QSurface code to
a separate except the destructor.

Change-Id: I2bf426a0b70cbffafae7aca8dd5550192f762aeb
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/gui/kernel/qsurface.cpp

@@ -88,7 +88,9 @@ QSurface::QSurface(SurfaceClass type)
 {
 }
 
-
+QSurface::~QSurface()
+{
+}
 
 QSurface::SurfaceClass QSurface::surfaceClass() const
 {

src/gui/kernel/qwindow.cpp

@@ -181,10 +181,6 @@ QWindow::~QWindow()
     destroy();
 }
 
-QSurface::~QSurface()
-{
-}
-
 /*!
     Set the \a surfaceType of the window.