Is there a way to revert a Unified system back to Block only?

I have a bunch of lab unified systems and I don't require file at all, don't want the data movers, don't even need the control station. Is there a way I can revert the SPs back to Block mode without the nuclear option of reinstalling the SPs from scratch?

The goal is so I can put my NICs from the data movers into the SPs and run iSCSI, that's all I need without all the bulk of the additional wiring and cabling. (Currently I put the cards in and it says incompatible for some reason, maybe because it's unified I figure)

I was thinking of trying to uninstall "UnisphereFile" from the SPs but would prefer some guidance first.

Thanks!

M