+ reimplement copyObject based on merge document

src/Mod/Sketcher/App/SketchObject.cpp

@@ -1656,13 +1656,6 @@ void SketchObject::onDocumentRestored()
     }
 }
 
-void SketchObject::onFinishDuplicating()
-{
-    Constraints.acceptGeometry(getCompleteGeometry());
-    rebuildVertexIndex();
-    onDocumentRestored();
-}
-
 void SketchObject::getGeoVertexIndex(int VertexId, int &GeoId, PointPos &PosId) const
 {
     if (VertexId < 0 || VertexId >= int(VertexId2GeoId.size())) {

src/Mod/Sketcher/App/SketchObject.h

@@ -163,7 +163,6 @@ protected:
     /// get called by the container when a property has changed
     virtual void onChanged(const App::Property* /*prop*/);
     virtual void onDocumentRestored();
-    virtual void onFinishDuplicating();
 
 private:
     std::vector<Part::Geometry *> ExternalGeo;