remove GraphicsScene related classes of the net oriented sample editor

GUI/View/SampleDesigner/ConnectableView.cpp

GUI/View/SampleDesigner/ConnectableView.h

GUI/View/SampleDesigner/DesignerMimeData.cpp

GUI/View/SampleDesigner/DesignerMimeData.h

GUI/View/SampleDesigner/DesignerScene.cpp

GUI/View/SampleDesigner/DesignerScene.h

GUI/View/SampleDesigner/DesignerView.cpp

GUI/View/SampleDesigner/DesignerView.h

GUI/View/SampleDesigner/ILayerView.cpp

GUI/View/SampleDesigner/ILayerView.h

GUI/View/SampleDesigner/IView.cpp

GUI/View/SampleDesigner/IView.h

GUI/View/SampleDesigner/InterferenceViews.cpp

GUI/View/SampleDesigner/InterferenceViews.h

GUI/View/SampleDesigner/ItemTreeView.cpp

GUI/View/SampleDesigner/ItemTreeView.h

GUI/View/SampleDesigner/LayerView.cpp

GUI/View/SampleDesigner/LayerView.h

GUI/View/SampleDesigner/MesoCrystalView.cpp

GUI/View/SampleDesigner/MesoCrystalView.h