delete obsolete code for generic UI creation

GUI/Model/Component/ComponentProxyModel.cpp

GUI/Model/Component/ComponentProxyModel.h

GUI/Model/Component/ComponentProxyStrategy.cpp

GUI/Model/Component/ComponentProxyStrategy.h

GUI/Model/Component/ComponentUtils.cpp

GUI/Model/Component/ComponentUtils.h

GUI/Model/Component/ProxyModelStrategy.cpp

GUI/Model/Component/ProxyModelStrategy.h

GUI/View/PropertyEditor/ComponentTreeView.cpp

GUI/View/PropertyEditor/ComponentTreeView.h

Tests/Unit/GUI/TestComponentProxyModel.cpp

Tests/Unit/GUI/TestComponentUtils.cpp

Tests/Unit/GUI/TestProxyModelStrategy.cpp