Remove unneeded includes of utils/runextensions.h

BTW, spotted some other unused includes marked with yellow.

Change-Id: I364e4b6fae73a2be2cfd3a63c1100be4a91aa49a
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/qmljstools/qmljsmodelmanager.cpp

@@ -38,13 +38,12 @@
 #include <QDir>
 #include <QFile>
 #include <QFileInfo>
-#include <utils/runextensions.h>
+#include <QLibraryInfo>
 #include <QTextDocument>
 #include <QTextStream>
 #include <QTimer>
 #include <QSet>
 #include <QString>
-#include <QLibraryInfo>
 #include <qglobal.h>
 
 using namespace Utils;