I asked this and one of the comments has nothing to do with the question. It's not "wrong" (in the sense of having incorrect information), it just is totally irrelevant to the question being asked.
I want to flag for removal to clean up the site, but I'm not sure which flag is appropriate. "Not Constructive" is, I thought, meant for comments that are joking around or being insulting. "Obsolete" seems wrong because the comment wasn't ever relevant, so it didn't stop at some point.
Which flag is appropriate in this situation?