Remove spurious include

While it's discouraged to use the entire module headers inside Qt, this
particular example also compiles without the line.

Change-Id: I75b6fc09e11d00df2f19f5db9b0209ed4cd82844
Reviewed-by: Laszlo Papp <lpapp@kde.org>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

src/qml/qml/qqmlbundle.cpp

@@ -40,7 +40,6 @@
 ****************************************************************************/
 
 #include "qqmlbundle_p.h"
-#include <QtCore/QtCore>
 #include <iostream>
 #include <cstdlib>