corrected error

childes_data.py

@@ -99,7 +99,7 @@ class Childes(datasets.GeneratorBasedBuilder):
     def _generate_examples(self, file_path):
         
         with open(file_path, 'r') as f:
-            for idx, line in enumerate(map(clean_text, f.readlines())):
+            for idx, line in enumerate(f.readlines()):
                 yield idx, {"text" : line}