rm obsolete forwards

GUI/Model/Project/ProjectDocument.h

@@ -29,7 +29,6 @@ class MessageService;
 class OutputDataIOService;
 class InstrumentItems;
 class SampleModel;
-class MaterialModel;
 class RealDataModel;
 class JobModel;
 class LinkInstrumentManager;

GUI/View/FromDomain/GUIExamplesFactory.h

@@ -17,8 +17,6 @@
 
 #include <QString>
 
-class SampleModel;
-class MaterialModel;
 class MultiLayerItem;
 
 //! Class that generates GUI model from

GUI/View/FromDomain/GUIObjectBuilder.h

@@ -20,7 +20,6 @@
 class SimulationOptionsItem;
 class ISimulation;
 class InstrumentItems;
-class MaterialModel;
 class MultiLayer;
 class SampleModel;
 class SessionItem;

GUI/View/Project/PyImportAssistant.h

@@ -20,7 +20,6 @@
 #include <memory>
 
 class SampleModel;
-class MaterialModel;
 class MultiLayerItem;
 class MultiLayer;