QmlProfiler: Remove slots declarations and Qt4 connections

The signals from QML are relayed through the respective models, so that
we don't have to use Qt4 connections there.

Change-Id: I864b49061c1f28acbebfc7378bfe39f96d3cae18
Reviewed-by: hjk <hjk@qt.io>

src/plugins/qmlprofiler/qmlprofilerstatisticsmodel.h

@@ -87,11 +87,9 @@ private:
     void loadEvent(const QmlEvent &event, const QmlEventType &type);
     void finalize();
 
-private slots:
     void dataChanged();
     void notesChanged(int typeIndex);
 
-private:
     class QmlProfilerStatisticsModelPrivate;
     QmlProfilerStatisticsModelPrivate *d;
 };