Update 3d_object_detection.py (#184)

* Update 3d_object_detection.py

* Apply formatting.

tutorials/3d_object_detection.py

@@ -56,9 +56,6 @@ def main(
  # Cuboids might not be available (e.g., using the "test" split).
  if sweep.cuboids is not None:
  # Annotations in (x,y,z,l,w,h,yaw) format.
- cuboids = sweep.cuboids.as_tensor()
-
- # Annotations in (x,y,z,l,theta) format.
  # 1-DOF rotation.
  xyzlwh_t = sweep.cuboids.as_tensor()
 
@@ -68,7 +65,7 @@ def main(
  # Access track uuid.
  track_uuid = sweep.cuboids.track_uuid
 
- # print(lidar_xyz_city, cuboids, xyzlwh_t, category, track_uuid)
+ # print(lidar_xyz_city, xyzlwh_t, category, track_uuid)
 
  if i >= max_iterations:
  logger.info(f"Reached max iterations of {max_iterations}!")