code: def clean_data():
      os.remove("test.csv")
      os.remove("test.txt")
      os.remove("test.gz")
  
file_path: AmpliGraph/tests/ampligraph/datasets/test_source_identifier.py
imports: import numpy
  import pytest
  import pandas
  from ampligraph.datasets import load_csv, chunks
  from ampligraph.datasets.source_identifier import DataSourceIdentifier
  import os
label_desc: Use image node_id 2 for calling a global function with example usage: clean_data() without return types