Adefemi v. Ashcroft, 358 F.3d 828 (11th Cir. Jan. 29, 2004), vacating and withdrawing previous opinion, 335 F.3d 1269 (11th Cir. June 30, 2003) (firearms conviction, rather than commission of firearms offense, required to strip court of appeals of petition for review jurisdiction over validity of removal order under transitional rules).