rm obsolete code

GUI/Model/Sample/ParticleItem.cpp

@@ -63,11 +63,6 @@ void ParticleItem::setFormFactor(const QString& model_type)
     setGroupProperty(P_FORM_FACTOR, model_type);
 }
 
-bool ParticleItem::isFormFactorPropertyName(const QString& name)
-{
-    return name == P_FORM_FACTOR;
-}
-
 FormFactorItem* ParticleItem::formFactor() const
 {
     return dynamic_cast<FormFactorItem*>(getGroupItem(P_FORM_FACTOR));

GUI/Model/Sample/ParticleItem.h

@@ -36,7 +36,6 @@ public:
 
     template <typename T> T* setFormFactorType();
     void setFormFactor(const QString& model_type);
-    static bool isFormFactorPropertyName(const QString& name);
     FormFactorItem* formFactor() const;
     GroupItem* formFactorItem() const;
 };