Not in the bell housing or anything but many folks also remove the clutch line restrictor.
+1 on the clutch line restrictor. I've noticed that in my GTI and my father's R (as well as a Mk6 GTI) that the clutch pedal was slow to come up on the track. In reality, it's almost certainly slow to come up all the time but I'm just not as aggressive/quick with my footwork on the street. In any case, my father's R blew the clutch because the pedal actually got stuck. We've put the ECS bleeder block in both cars, and the clutch returns more freely in both cars now. You can also just pull the restrictor out of the stock part.
This is admittedly purely anecdotal, and someone who knows more about this can correct me, but it seems to me that the restrictor can lead to excessive wear on the clutch. In any case, it's either relatively inexpensive (ECS block) or free (pulling the restrictor out of the stock part) and worth doing on the off chance that you might end up ruining your new/expensive clutch. For whatever it's worth, ECS recommends pulling the restrictor on their SMF clutch kit (but they also sell the bleeder block, so grain of salt and all that).