I did it as i lost my love for trials for a while. I was bored of being a tgs'er and needed something to keep me interested. I rode brakeless for a couple of weeks and learnt new techniques etc
now i have taken them back to my proper trials bike and i am loving it again (well i was, until i came back from buthiers and now all i do is ride demos ).
You will find that riding without brakes improves your bike control. There is no denying it, and you definitely notice it when you get back to riding with brakes. i spend lots less time using my brakes for balancing and if i am doing certain things in a line ill try to not use my brakes.
and as OBM says....its fun