[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

monai/losses/perceptual.py

@@ -15,7 +15,6 @@
 
 import torch
 import torch.nn as nn
-from huggingface_hub import hf_hub_download
 
 from monai.utils import optional_import
 from monai.utils.enums import StrEnum