Thomas,
In the current real world of cutting golf course costs, yes, eliminating bunkers that don't see much action is a real thing. I have been back to my own courses (and several others) to reduce sand bunkering without really affecting course quality. Obviously, removing sand bunkers that don't seem to affect play is one technique.
Or, parts of sand bunkers. I went back to my Sand Creek Station a few years back. On the 8th, I had wrapped a bunker around to flash from the housing, and also just to have the variety of a bigger bunker somewhere. That part was well off the play line. With no more need to sell houses, the crew showed me the lack of ball marks, raking, etc. and the back half of it came out. No big loss for golf. Another example is bunkers whose outside edges are further from the green than the width of the green itself. I have been able to trim those outside lobes or areas and actually, IMHO, improve the visuals, because it makes the green the primary visual target, as, again IMHO, it should be.
Similarly, the formerly popular "fore" bunkers are easy enough to take out, even if they complete a visual composition. And, bunkers behind greens are tougher to lose, because they often complete a composition, test distance accuracy to certain pins, etc., but generally fail to yield significant play.
When I entered the biz in 1977, it was gospel that there were to be no bunkers that were out of play for the best players. When money was flowing in the next two decades, that sort of relaxed, and probably still is for high end courses. For the mid and lower level clubs and publics, that line of thought is surely coming back into play, for better or worse.
It is not too hard for me to reduce bunkering from 20-50%, usually in advance of placing expensive bunker liners and white sand, and still see 90% of the function and visuals that were had before. I guess that says that in the 90's, we got a little to casual with bunker size and placement for a variety of reasons.