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/qmlprofilertimelinemodel.h

@@ -55,14 +55,13 @@ public:
     virtual void loadEvent(const QmlEvent &event, const QmlEventType &type) = 0;
     virtual void finalize() = 0;
 
-private slots:
-    void dataChanged();
-    void onVisibleFeaturesChanged(quint64 features);
-
 protected:
     void announceFeatures(quint64 features);
 
 private:
+    void dataChanged();
+    void onVisibleFeaturesChanged(quint64 features);
+
     const Message m_message;
     const RangeType m_rangeType;
     const ProfileFeature m_mainFeature;