A question I asked on Stack Overflow turned out to be a duplicate, and was closed. I checked the linked questions, and found satisfactory answer. Later, I thought deleting the question, as it seemed to provide no value to the site.
But, today when I looked again, it had 2 upvotes. Both upvotes were cast after the question was closed. I don't know why people upvoted a closed question. I still think that question must be deleted. Just to be sure, I'm asking here. Is there any reason that I should keep the question undeleted?
