IMHO, it's not a bad question at all. That you so far got only up votes (and not only few at that, which for a Sunday is a pretty good feat on our still young site), no close votes and at least two helpful answers (and a copy edit) that might help someone else wondering about the same thing too means the question has been accepted by our community. So what if you misinterpreted or missed altogether some fine print? It happens to all of us.
No, you shouldn't remove the question and indeed you cannot remove it since it has positive score answers. The only way to remove it now would be through moderator flags, but would likely be rejected (I would) on grounds of not being anything obviously wrong with it. That would happen only if you inadvertently posted some sensitive information in it, or anything like that. So without good grounds for deletion, even moderators won't be inclined to oblige your delete request.
Leave it as is. Or, if you'd really like to disassociate yourself from it, edit to convert it into a community wiki. But there isn't any need for that either, and we're trying to avoid community wiki threads if at all possible, so we keep contributions authored (any new answers to community wiki questions are automatically converted into community wikis too).