Below is the list of some commands that IMO can be removes safely from Arma 3. They do nothing but add to clutter and confusion.
gearIDCAmmoCount
gearSlotAmmoCount
gearSlotData
All 3 "getter" commands are non functional in Arma 3, whats more the 3 corresponding "setter" commands have been removed from Arma 3 for good, just recently, so this is not clear why leave these 3.
benchmark
Obsolete and returns 2000 no matter what.
findCover
not event implemented
showWarrant
shownWarrant
both obsolete for ages, just add to clutter and confusion
AISFinishHeal
Couldn't make it work. It supposed to work with "HandleHeal" EH for some sort of override, but it looks like "HandleHeal" override is also broken. Also recent removal of setAIS makes me think this is just another useless leftover from glorious days.
setPosASL2
does nothing, probably VBS command and is disabled in Arma 3, yet present in supportInfo