Update files from the datasets library (from 1.6.0)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.6.0

super_glue.py

@@ -16,13 +16,10 @@
 # Lint as: python3
 """The SuperGLUE benchmark."""
 
-from __future__ import absolute_import, division, print_function
 
 import json
 import os
 
-import six
-
 import datasets
 
 
@@ -592,11 +589,11 @@ def _fix_wst(ex):
 
 def _cast_label(label):
     """Converts the label into the appropriate string version."""
-    if isinstance(label, six.string_types):
+    if isinstance(label, str):
         return label
     elif isinstance(label, bool):
         return "True" if label else "False"
-    elif isinstance(label, six.integer_types):
+    elif isinstance(label, int):
         assert label in (0, 1)
         return str(label)
     else: