[Python-checkins] Doc: io: Remove "In-memory streams" section (GH-24927)

[methane]

https://github.com/python/cpython/commit/244fa236e422020ad1a0c1be8d5b53496bd3d0f2
commit: 244fa236e422020ad1a0c1be8d5b53496bd3d0f2
branch: 3.9
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: methane <songofacandy at gmail.com>
date: 2021-04-01T15:11:49+09:00
summary:

Doc: io: Remove "In-memory streams" section (GH-24927)

(cherry picked from commit b045cdaf341f80b7d1e4804b932b6e415600c2e1)

Co-authored-by: Inada Naoki <songofacandy at gmail.com>

files:
M Doc/library/io.rst

diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index aecbec56866d7..96e02e839ae65 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -155,16 +155,6 @@ High-level Module Interface
    when an unsupported operation is called on a stream.
 
 
-In-memory streams
-^^^^^^^^^^^^^^^^^
-
-It is also possible to use a :class:`str` or :term:`bytes-like object` as a
-file for both reading and writing.  For strings :class:`StringIO` can be used
-like a file opened in text mode.  :class:`BytesIO` can be used like a file
-opened in binary mode.  Both provide full read-write capabilities with random
-access.
-
-
 .. seealso::
 
    :mod:`sys`