I do not have Mac so I can not test it for you.
You can remove TraceSet but you need to the following line from "Initialization" page,too!

_view.getElement("[b]TraceSet[/b]").reset();

It will cause java error if you did not remove the above line (because TraceSet is no longer exists).
That is the reason you did not see vector field if you just remove "TreacSet" from the view.