Welcome to the forums. For the future, here are owners threads for just about every set under the sun, the F8000 included. Always best to post there to reduce clutter in the forum as well as get a quick answer from people who own the set. You can also read/search those threads for answers as they've almost inevitably already been covered.
To your question - go into the universal remote set up and delete the STB you find there. That should do the trick. Enjoy!
Stuck up, half witted, scruffy looking, nerf herder.