I think it went away! Just test book some "what-if" reservations.
One nice part of the no longer available points calculator was that it would also tell you how many points you could earn for an entered dollar amount.
I tried to test book, but I can't find the screen that allows me to use points instead of paying. I'm even trying a short trip that I have more than enough points for just to see if it is blocked out if you don't have enough points