I'm sure every one of us has answers that just never went anywhere. In some cases, I'm sure we all have answers that we posted to questions where another answer was accepted and got a positive score, whereas our answer got zero score. In my case, the reason is obvious: Good material gets upvotes... :) Just kidding. It's part of the system; it's how it should work.
The question is, in such a case, should I delete my answer? It isn't serving any purpose: if no one has upvoted it after a few months, it's clear that it didn't add anything to the post, and it isn't really all that helpful. Is this kind of answer unnecessary clutter?