Does the pump valve unit make sense?

Hello, especially to the old rabbits and professionals:

Pump valve unit at the pre-facelift, which sits half under the brake booster and half under the fan motor.
Repair would be the horror, far too elaborate.

Three months ago, I stuck that thing off because of his annoying hum.

Already there I have not been able to detect any functional restrictions either with the air conditioning system or for the heating.

Even now, in winter everything runs smoothly, the car gets warm quickly and in summer it was quickly cold - without a pump valve unit, because it is without electricity..

That's why the provocative question - or am I just lucky?

Thank you and greetings