code: def remove_attacked_feature(
      attack_feature: Union[int, slice],
      non_numerical_features: Optional[List[int]],
  ):
      """
      Removes the attacked feature from the list of non-numeric features to encode.
  
      :param attack_feature: The index or slice representing a feature to attack
      :param non_numerical_features: a list of feature indexes that require encoding in order to feed into an ML model
                                      (i.e., strings)
      :return:
      """
      if non_numerical_features is not None and isinstance(
          attack_feature, int
      ):
          if attack_feature in non_numerical_features:
              non_numerical_features.remove(attack_feature)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  import math
  import os
  import shutil
  import sys
  import tarfile
  import warnings
  import zipfile
  from functools import wraps
  from inspect import signature
  from typing import TYPE_CHECKING, Callable, List, Dict, Optional, Tuple, Union
  import numpy
  import six
  from scipy.special import gammainc
  from tqdm.auto import tqdm
  from art import config
label_desc: Use image node_id 21 for calling a global function with example usage: remove_attacked_feature(attack_feature, non_numerical_features) without return types