Why not try it with them and then decide ? Any reason you really want to take them off ?
They were clearly put on for a reason ( as has been said maybe to conter being a bit tail heavy ) .
I added them to my 4m as while it planed easily it did a good impression of a rocket until it got going. Admitedly it was only for a second or so , but helped me no end & I can now plane at lower speeds ( within the harbour speed limit