You would need it for the more powerful rear electric motor that is sandwiched between the crankshaft and transmission.
I would imagine removing this motor would be a much more involved process than removing the front motors which basically just sit by themselves, not connected to anything else that's important. The car would also lose all of its torque-fill abilities if the entire hybrid system was deleted.
The elec motor that is sandwich between the crank and transmission is there to only charge the hybrid battery pack. So if you were to remove the front TMU, then the entire hybrid system is now worthless.