remove friend class of QClassFactory for QCoreApplication

from this commit: 38be0d1383

Change-Id: I3c1cbdf793f321febfda0c3b5a931eb1190e9195
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qcoreapplication.h

@@ -214,7 +214,6 @@ private:
     friend bool qt_sendSpontaneousEvent(QObject *, QEvent *);
 #endif
     friend Q_CORE_EXPORT QString qAppName();
-    friend class QClassFactory;
     friend class QCommandLineParserPrivate;
 };