py3: Remove "from six.moves import range".

This is no longer required, since in Python 3, this is what the range
built-in does.

tools/setup/emoji/emoji_setup_utils.py

@@ -11,7 +11,7 @@ from collections import defaultdict
 from itertools import permutations, chain
 import ujson
 
-from six.moves import range, zip
+from six.moves import zip
 from typing import Any, Dict, List, Text
 
 # Emojisets that we currently support.