Just the facts wrote
... For what it's worth, they will typically be found on mechanical injection systems. The newer HEUI (Hydraulically actuated Electronically controlled Unit Injection) and piezoelectric common rail injection systems will typically not use an aneroid compensator since they more often use MAP of MAF sensors to determine air flow.
Hmm ... I've been looking around a bit, and I think that your point is valid. My questions would then be as follows:
1) How many mechanical injection systems are subject to smog check? My guess is not many.
2) Of all the things that the OIS could prompt for, why this (rather obscure) item?
3) Is this some sort of test to see if we're paying attention? For example, if we enter "Pass" instead of "N/A" for a vehicle with no aneroid compensator, are we broadcasting our ignorance, and leaving ourselves open for a reprimand or citation for entering incorrect information?