Mark,
One of the all time gca dilemmas. Its been a while since I have been there - any chance it is merely an obsolete bunker?
Beauty and strategy are both important components. One gca who deep down, favors beauty, would likely put in a non play bunker, whereas another more strategically oriented one would leave it out. Or a marketing oriented on would put it in and call it both, giving it a name like "random bunkering"!
I know that Ross said they should serve both purposes, but every site usually presents itself with a great looking bunker or feature location that doesn't exactly come into play. I am always tempted to add a bunker, if it helps artistic composition. That's because I got started in golf during the design low period of the 70's where every bunker that "didn't serve a purpose" had been removed, and courses seemed pretty dull. The random bunkers came back into style, not coincidentally during a period of good economy, and I suspect they will go right back out of style as we revert to more normal (read: kinda sucks) economic conditions.....