Remove shebang line when not strictly required

Summary: The shebang line `#!<path to interpreter>` is only required for Python scripts, so remove it on source files for class or function definitions. Additionally explicitly mark as executable the actual Python scripts in the codebase.

Reviewed By: nikhilaravi

Differential Revision: D20095778

fbshipit-source-id: d312599fba485e978a243292f88a180d71e1b55a

docs/tutorials/utils/camera_visualisation.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 import matplotlib.pyplot as plt

docs/tutorials/utils/plot_image_grid.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 import matplotlib.pyplot as plt

pytorch3d/io/obj_io.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/io/ply_io.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 # This source code is licensed under the license found in the
 # LICENSE file in the root directory of this source tree.

pytorch3d/loss/chamfer.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 import torch

pytorch3d/loss/mesh_edge_loss.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 import torch

pytorch3d/loss/mesh_laplacian_smoothing.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
 
 

pytorch3d/loss/mesh_normal_consistency.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
 
 

pytorch3d/ops/cubify.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/ops/graph_conv.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/ops/mesh_face_areas_normals.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 import torch

pytorch3d/ops/nearest_neighbor_points.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/ops/packed_to_padded.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 import torch

pytorch3d/ops/sample_points_from_meshes.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/ops/subdivide_meshes.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/ops/vert_align.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/renderer/blending.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 

pytorch3d/renderer/cameras.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
 
 import math

pytorch3d/renderer/lighting.py

-#!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.