Removing TPS would be like removing the accel pump from a carb. You can tune acceleration enrichment from MAP changes alone but any real heavy transients may bog. It's actually not needed with SD but 100% required on alpha-n.
Consider TPS a gauge of 'drivers intention' rather than just the throttle angle and the benefits w/ EFI come out a bit more:
-Driver intends to sit at a stoplight, or cruise (engine states)
-Driver intends to coast down this hill in gear, no longer a need for any fuel (engine states)
-Driver intends to pass slowly (engine states, acceleration enrichment)
-Driver intends to pass aggressively (engine states, acceleration enrichment, fuel table switch, disable AC compressor)
-Driver intends to run more boost than they should on a stock motor (boost target switching, methanol injection trigger)
Plus looking at data logs later w/out TPS is a bit frustrating as you may wonder what was going on at certain times.