Fem: Remove unused view properties

src/Mod/Fem/Gui/ViewProviderFemConstraintContact.cpp

@@ -44,7 +44,7 @@ ViewProviderFemConstraintContact::ViewProviderFemConstraintContact()
     loadSymbol((resourceSymbolDir + "ConstraintContact.iv").c_str());
     // Note change "Contact" in line above to new constraint name, make sure it is the same as in
     // taskFem* cpp file
-    ADD_PROPERTY(FaceColor, (0.2f, 0.3f, 0.2f));
+    ShapeAppearance.setDiffuseColor(0.2f, 0.3f, 0.2f);
 }
 
 ViewProviderFemConstraintContact::~ViewProviderFemConstraintContact() = default;