they may be going through another series of A/B (A/B/C/...) tests, but i still have it, now called "Cancel/Refund" both at the top in the list of things you can do to your reservation and at the bottom under "Total Price". (checked both award reservations i have, same)
Reservation Tools: Change Flights | Cancel/Refund | View Baggage Service Charges | E-mail Summary | Print Itinerary | Export to Calendar | Rename Reservation | Reserve a Hotel | Reserve a Car |