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

tests/test_cubify.py

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

tests/test_face_areas_normals.py

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

tests/test_graph_conv.py

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

tests/test_lighting.py

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

tests/test_materials.py

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

tests/test_mesh_edge_loss.py

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

tests/test_mesh_laplacian_smoothing.py

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

tests/test_mesh_normal_consistency.py

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

tests/test_mesh_rendering_utils.py

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

tests/test_meshes.py

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

tests/test_nearest_neighbor_points.py

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

tests/test_obj_io.py

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

tests/test_packed_to_padded.py

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

tests/test_ply_io.py

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

tests/test_rasterize_meshes.py

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

tests/test_rasterizer.py

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

tests/test_rendering_meshes.py

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

tests/test_rendering_utils.py

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

tests/test_rotation_conversions.py

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

tests/test_sample_points_from_meshes.py

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