Just long press on the icon and drag it to the bottom and you will see the trash can.
I don't like my new Droid. However, deleting these duplicate icons was one of my few successes. If you get the touch right, you can drag the extra icons to the bottom (where the app bar is) and the app bar turns into a trash can, and you can delete the extra icons. You have to work on the touch....it's not automatic that you can drag the icon....sometimes, it wants to open, instead. Keep playing around with it; you'll get it.