I dont think so. Your body will still use the fermenting fibre or something like that.
However, it is a stupid thing for people to go on about. Celery, cucumber, lettuce and a whole host of veg have so little calories that just running up and down the stairs would probably balance a portion out.
All these people who come out with this celery theory with a smug look on their face- I bet none of them actually eat it on its own...