Remove spurious comma in GaussianPointCloudScene.py

[dllu]

The comma makes it a tuple (None, ) instead of just None. Then, it fails with:

In [3]: scene = GaussianPointCloudScene.from_parquet('/home/danlu/debug/gaussian-splatting-2/logs/scene_169000.parquet')
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[3], line 1
----> 1 scene = GaussianPointCloudScene.from_parquet('/home/danlu/debug/gaussian-splatting-2/logs/scene_169000.parquet')

File ~/builds/taichi_3d_gaussian_splatting/taichi_3d_gaussian_splatting/GaussianPointCloudScene.py:150, in GaussianPointCloudScene.from_parquet(path, config)
    147 else:
    148     valid_point_cloud_features = torch.from_numpy(
    149         scene_df[feature_columns].to_numpy())
--> 150     scene = GaussianPointCloudScene(
    151         point_cloud, config, point_cloud_features=valid_point_cloud_features)
    152 return scene

File ~/builds/taichi_3d_gaussian_splatting/taichi_3d_gaussian_splatting/GaussianPointCloudScene.py:42, in GaussianPointCloudScene.__init__(self, point_cloud, config, point_cloud_features)
     40 if config.max_num_points_ratio is not None:
     41     num_points = point_cloud.shape[0]
---> 42     max_num_points = int(num_points * config.max_num_points_ratio)
     43     assert max_num_points > num_points, "max_num_points_ratio should be greater than 1.0"
     44     point_cloud = torch.cat(
     45         [point_cloud, torch.zeros((max_num_points - num_points, 3))], dim=0)

TypeError: int() argument must be a string, a bytes-like object or a number, not 'tuple'

[wanmeihuali]

Thanks a lot for your contribution!