code: def test_remove_categories(self):
      pidx = pd.CategoricalIndex([1, 2, 3], categories=[3, 2, 1])
      psidx = ps.from_pandas(pidx)
  
      self.assert_eq(
          pidx.remove_categories(2), psidx.remove_categories(2)
      )
      self.assert_eq(
          pidx.remove_categories([1, 3]),
          psidx.remove_categories([1, 3]),
      )
      self.assert_eq(
          pidx.remove_categories([]), psidx.remove_categories([])
      )
      self.assert_eq(
          pidx.remove_categories([2, 2]),
          psidx.remove_categories([2, 2]),
      )
      self.assert_eq(
          pidx.remove_categories([1, 2, 3]),
          psidx.remove_categories([1, 2, 3]),
      )
      self.assert_eq(
          pidx.remove_categories(None), psidx.remove_categories(None)
      )
      self.assert_eq(
          pidx.remove_categories([None]),
          psidx.remove_categories([None]),
      )
  
      self.assertRaises(ValueError, lambda: psidx.remove_categories(4))
      self.assertRaises(
          ValueError, lambda: psidx.remove_categories([4, None])
      )
  
imports: import unittest
  import pandas
  from pandas.api.types import CategoricalDtype
  import pyspark.pandas
  from pyspark.loose_version import LooseVersion
  from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils
label_desc: Use image node_id 4 for calling the CategoricalIndexTestsMixin obj's underlying member method code with example usage: obj.test_remove_categories() without return types