How to delete a poll?

[Mcflyy]

I created the Nintendo thread in General a while back, and I decided to upload a poll back in like August or so of last year, and I can't find a way to delete the poll, I tried changing the date closure, but nothing happens.

I attached a screenshot of what the edit option looks like, and I figured that that's where I'd be able to delete the poll but there isn't an option for that.
At least an option to change the poll as far as the question would be appreciated but I can't change that, just add more responses and no way of deleting the current responses.
Any help would be appreciated, thanks.