code: def test_remove_empty(df):
      """This test ensures that there are no columns that are completely null"""
      df = df.remove_empty()
      for col in df.columns:
          assert not pd.isna(df[col]).all()
      for r, d in df.iterrows():
          assert not pd.isna(d).all()
  
file_path: pyjanitor/tests/functions/test_remove_empty.py
imports: import numpy
  import pandas
  import pytest
  from hypothesis import given, settings
  from janitor.testing_utils.strategies import df_strategy
label_desc: Use image node_id 1 for calling a global function with example usage: test_remove_empty(df) without return types