It was most liekly pulled due to the name "Zelda Maker" after Nintendo has seen the success of Super Mario Maker.
I don't want to assume too much, but that shows me there could be a chance for a Zelda Maker at some point in the future. If he would have named it something else, there would be no issues. As a stance for my argument, Zelda Classic has been around for almost 2 decades now if not longer. I remember it from 2001. I have a PC Gamer disc from back then that has Zelda Classic on it.
Nintendo could have surely pulled that down by now, but they haven't.
It is simply the fact that he called it "Zelda Maker".