typeshed: remove crufty comments (#4699)

Co-authored-by: hauntsaninja <>

stdlib/2/cStringIO.pyi

@@ -1,12 +1,7 @@
-# Stubs for cStringIO (Python 2.7)
-# See https://docs.python.org/2/library/stringio.html
-
 from abc import ABCMeta
 from types import TracebackType
 from typing import IO, Iterable, Iterator, List, Optional, Union, overload
 
-# TODO the typing.IO[] generics should be split into input and output.
-
 # This class isn't actually abstract, but you can't instantiate it
 # directly, so we might as well treat it as abstract in the stub.
 class InputType(IO[str], Iterator[str], metaclass=ABCMeta):