remove unused function and add docstring

tests/dataframe_tests/test_dataframe_aggregation.py

@@ -100,8 +100,8 @@ def test_translate_count_aggregation(translator):
 def test_flatten_nested_array_parent_props(translator):
     """
     Test to ensure the created dataframe will not contains any array being nested in another array
-    - input dataframe with leaf nodes containing nested list
-    - expected dataframe with leaf nodes no longer containing nested list
+    - input dataframe is the data of root_node (participant)
+    - we will test after callng translate_parent, it will produce the array field without nested array
     :param translator:
     :return:
     """

tests/util.py

@@ -57,9 +57,6 @@ def get_dataframes_from_names(spark_session, schema_name, parquet_files, schemas
         ))
     return dataframes
 
-def generate_dataframe_from_jsons(translator, schema_name, node_name):
-    pass
-
 
 def schema_to_dict_fields(schema):
     dict_fs = {}