code: def test_get_files_to_remove():
      from collections import OrderedDict
  
      dict_a = OrderedDict(
          {"1": ["2"], "2": ["1", "3"], "3": ["4"], "4": ["3"], "5": []}
      )
      dups_to_remove = general_utils.get_files_to_remove(dict_a)
      assert set(dups_to_remove) == set(["2", "4"])
  
imports: import os
  import json
  import numpy
  from imagededup.utils import general_utils
label_desc: Use image node_id 1 for calling a global function with example usage: test_get_files_to_remove() without return types