Clean headers in Qt4ProjectManager.

Ran script to remove inludes on a trial-and-error basis and
manually corrected it.

Change-Id: I53fa1aafaf98fd3105ef35b595e4311854cf9cbc
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/qt4projectmanager/qmakeparser.cpp

@@ -28,11 +28,9 @@
 ****************************************************************************/
 
 #include "qmakeparser.h"
-#include "qt4projectmanagerconstants.h"
 
 #include <projectexplorer/task.h>
 #include <projectexplorer/projectexplorerconstants.h>
-#include <utils/qtcassert.h>
 
 using namespace Qt4ProjectManager;
 using namespace Qt4ProjectManager::Internal;