From 72a745b2f83a079db748bae47e721727942ae882 Mon Sep 17 00:00:00 2001
From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Thu, 25 May 2017 19:36:08 -0700
Subject: [PATCH] remove collections.MutableString (#1356)

It does not exist (some StackOverflow question I found suggests it was removed in 2.6).
---
 stdlib/3/collections/__init__.pyi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/stdlib/3/collections/__init__.pyi b/stdlib/3/collections/__init__.pyi
index 4e460b873..2de35454e 100644
--- a/stdlib/3/collections/__init__.pyi
+++ b/stdlib/3/collections/__init__.pyi
@@ -58,7 +58,6 @@ def namedtuple(typename: str, field_names: Union[str, Iterable[Any]], *,
 class UserDict(MutableMapping): ...
 class UserList(MutableSequence): ...
 class UserString(Sequence): ...
-class MutableString(UserString, MutableSequence): ...
 
 # Technically, deque only derives from MutableSequence in 3.5.
 # But in practice it's not worth losing sleep over.