No, you don't have to take it down. But it was a really difficult, challenging, and extensive map for IAB to make so you should especially just go onto his quiz and ask. No big deal, and thanks for understanding.
Edit: One more thing is that Stewart didn't do anything to make the map like it says in your caveat, he just uploaded it to IAB's quiz because it was way over the maximum file size.
Edit: One more thing is that Stewart didn't do anything to make the map like it says in your caveat, he just uploaded it to IAB's quiz because it was way over the maximum file size.