The good part of this is that unicrown fork. For the many who hate those forks; don't worry, It won't be a unicrown long.
And my experience - I had a fork fail 5/8" from your grinding. It was life changing and not for the better. OP, you just remove significant material from the most critical area on the bike. If it fails and all you get is a broken collarbone, a wrecked helmet and a few less teeth, consider yourself very lucky. (The chainstays are no big deal. They'll break but you won't get hurt.)