it's an exception boys. some areas (ie. upper credit river) explicitly state single (one point), non-barbed hook only. no trebles (three points).
personally i don't think it's such a bad thing, we've gone to single siwash hooks on all our spring trout lures (body baits, spoons & spinners). the baits run better in my opinion and it makes release that much easier. trout and trebles are like velcro i've found.
to the original poster, unless the treble is on a split ring, you can't remove it without cutting the treble. what dave524 said about the single siwash' is correct, they are still around. they come with the eye open so you can put it on your lure and squash it. don't forget to file down the barb.