code: def clean_sources(task):
      if task not in _CLEAN_FILES:
          raise NotImplementedError(f"Unexpected task: {task}")
      paths = []
      for file in _CLEAN_FILES[task]:
          path = torchaudio.utils.download_asset(f"test-assets/{file}")
          paths.append(path)
      return paths
  
file_path: audio/test/integration_tests/conftest.py
imports: import os
  import shutil
  import pytest
  import torch
  import torchaudio
label_desc: Use image node_id 4 for calling a global function with example usage: clean_sources(task) and returns: paths