Core: Use some data members in NavigationWidgetFactory

Adjust user code, remove unused bits.

Change-Id: I351deb27679c9251518a4d1bf7f78a12bacae2fb
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/classview/classviewmanager.cpp

@@ -224,10 +224,6 @@ void Manager::initialize()
 {
     // use Qt::QueuedConnection everywhere
 
-    // widget factory signals
-    connect(NavigationWidgetFactory::instance(), SIGNAL(widgetIsCreated()),
-            SLOT(onWidgetIsCreated()), Qt::QueuedConnection);
-
     // internal manager state is changed
     connect(this, SIGNAL(stateChanged(bool)), SLOT(onStateChanged(bool)), Qt::QueuedConnection);
 
@@ -318,17 +314,6 @@ void Manager::setState(bool state)
     emit stateChanged(d->state);
 }
 
-/*!
-    Reacts to the widget factory creating a widget.
-
-    \sa setState, state
-*/
-
-void Manager::onWidgetIsCreated()
-{
-    // do nothing - continue to sleep
-}
-
 /*!
     Reacts to the \a visibility of one navigation pane widget being changed
     (there might be a lot of them).