It doesn't.
According to the Constitution Society's website, it's still there.
The Constitution: Amendment X is right below Amendment IX on this page.
Oh yeah, and isn't it great to see the judge, the DoJ, and the press tiptoe around the Xth as if it didn't exists.Actually, they don't even bother to tiptoe around it - it was long ago used in the court's restroom after the illustrious judges had polished off a big bag of Olestra Doritos.