Clean headers in ProjectExplorer.

Change-Id: If61a8a91d2a39c5c97974a5bfcef91892b68d3f1
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/projectexplorer/abstractprocessstep.cpp

@@ -29,17 +29,14 @@
 
 #include "abstractprocessstep.h"
 #include "ansifilterparser.h"
-#include "buildconfiguration.h"
 #include "buildstep.h"
 #include "ioutputparser.h"
 #include "project.h"
-#include "target.h"
 #include "task.h"
 
 #include <utils/qtcassert.h>
 #include <utils/qtcprocess.h>
 
-#include <QEventLoop>
 #include <QTimer>
 #include <QDir>