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/qmlprofilerstatewidget.h

@@ -41,13 +41,12 @@ public:
                                     QmlProfilerModelManager *modelManager, QWidget *parent = 0);
     ~QmlProfilerStateWidget();
 
-private slots:
+private:
     void showText(const QString &text);
     void updateDisplay();
     void update();
     void reposition();
 
-private:
     class QmlProfilerStateWidgetPrivate;
     QmlProfilerStateWidgetPrivate *d;
 };