code: def _remove_finder(importer, finder):
    
  
    existing_finder = _get_finder(importer)
  
    if not existing_finder:
      return
  
    if isinstance(existing_finder, ChainedFinder):
      try:
        existing_finder.finders.remove(finder)
      except ValueError:
        return
      if len(existing_finder.finders) == 1:
        pkg_resources.register_finder(importer, existing_finder.finders[0])
      elif len(existing_finder.finders) == 0:
        pkg_resources.register_finder(importer, pkg_resources.find_nothing)
    else:
      pkg_resources.register_finder(importer, pkg_resources.find_nothing)
docs: Remove an existing finder from pkg_resources.