Clean headers in QmlJsTools.

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

Change-Id: I22fb33b8589dcd2f4b880eb320d7fa86de8a6f67
Reviewed-by: Aurindam Jana <aurindam.jana@digia.com>

src/plugins/qmljstools/qmljstoolsplugin.h

@@ -31,10 +31,6 @@
 #define QMLJSTOOLS_H
 
 #include <extensionsystem/iplugin.h>
-#include <projectexplorer/projectexplorer.h>
-
-#include <QTextDocument>
-#include <QSharedPointer>
 
 QT_BEGIN_NAMESPACE
 class QFileInfo;