Remove unused local variables and functions

src/battle_anim_flying.c

@@ -708,7 +708,6 @@ static void sub_810E520(struct Sprite *sprite)
                     }
                 }
                 data->unk0_0d = 0;
-                data->unk2;
             }
             data->unk0_1 = 0;
             break;