Simply go to your home screen and do either of the following:
1. On any home screen, pinch with 2 fingers... This brings up all your home screens as thumbnails, press and hold a scren that you dont want and drag it to the bin icon at the bottom.
2. On any home screen, press left soft key (menu context key) and press edit... This brings up all your home screens as thumbnails, press and hold a scren that you dont want and drag it to the bin icon at the bottom.
Hope this helps.