Remove unused imports

Signed-off-by: Nilaksh Das <[email protected]>

Author: nilakshdas

art/defences/preprocessor/mp3_compression_pytorch.py

@@ -64,7 +64,6 @@ def __init__(
         :param device_type: Type of device on which the classifier is run, either `gpu` or `cpu`.
         :param verbose: Show progress bars.
         """
-        import torch  # lgtm [py/repeated-import]
         from torch.autograd import Function
 
         super().__init__(

art/defences/preprocessor/video_compression_pytorch.py

@@ -70,7 +70,6 @@ def __init__(
         :param device_type: Type of device on which the classifier is run, either `gpu` or `cpu`.
         :param verbose: Show progress bars.
         """
-        import torch  # lgtm [py/repeated-import]
         from torch.autograd import Function
 
         super().__init__(

art/preprocessing/audio/l_filter/pytorch.py

@@ -71,7 +71,6 @@ def __init__(
         :param verbose: Show progress bars.
         :param device_type: Type of device on which the classifier is run, either `gpu` or `cpu`.
         """
-        import torch  # lgtm [py/repeated-import]
 
         super().__init__(
             device_type=device_type,

art/preprocessing/standardisation_mean_std/pytorch.py

@@ -54,7 +54,6 @@ def __init__(
         :param mean: Mean.
         :param std: Standard Deviation.
         """
-        import torch  # lgtm [py/repeated-import]
 
         super().__init__(
             device_type=device_type,