Remove commented out code

Author: jonathandung

Lib/_collections_abc.py

@@ -67,7 +67,6 @@ def _f(): pass
 # are not included on this list.
 bytes_iterator = type(iter(b''))
 bytearray_iterator = type(iter(bytearray()))
-#callable_iterator = ???
 dict_keyiterator = type(iter({}.keys()))
 dict_valueiterator = type(iter({}.values()))
 dict_itemiterator = type(iter({}.items()))
@@ -319,7 +318,6 @@ def __subclasshook__(cls, C):
 
 Iterator.register(bytes_iterator)
 Iterator.register(bytearray_iterator)
-#Iterator.register(callable_iterator)
 Iterator.register(dict_keyiterator)
 Iterator.register(dict_valueiterator)
 Iterator.register(dict_itemiterator)