gnu: Remove unused patch.

* gnu/packages/patches/python-flake8-polyfill-flake8-4-compat.patch:
Remove file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu/local.mk

@@ -1593,7 +1593,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/ppsspp-disable-upgrade-and-gold.patch		\
   %D%/packages/patches/pthreadpool-system-libraries.patch	\
   %D%/packages/patches/python-chai-drop-python2.patch		\
-  %D%/packages/patches/python-flake8-polyfill-flake8-4-compat.patch	\
   %D%/packages/patches/python-random2-getrandbits-test.patch		\
   %D%/packages/patches/python-poppler-qt5-fix-build.patch	\
   %D%/packages/patches/python-w3lib-fix-test-failure.patch	\

gnu/packages/patches/python-flake8-polyfill-flake8-4-compat.patch

@@ -1,32 +0,0 @@
-https://github.com/PyCQA/flake8-polyfill/commit/3cf414350e82ceb835ca2edbd5d5967d33e9ff35.patch
-
-
-From 3cf414350e82ceb835ca2edbd5d5967d33e9ff35 Mon Sep 17 00:00:00 2001
-From: Ian Stapleton Cordasco <graffatcolmingov@gmail.com>
-Date: Mon, 1 Nov 2021 19:18:04 -0500
-Subject: [PATCH] Skip unnecessary tests on Flake8 4.x+
-
----
- tests/test_stdin.py | 4 ++++
- 1 file changed, 4 insertions(+)
-
-diff --git a/tests/test_stdin.py b/tests/test_stdin.py
-index 4350967..212b309 100644
---- a/tests/test_stdin.py
-+++ b/tests/test_stdin.py
-@@ -1,4 +1,5 @@
- """Tests for polyfill's stdin monkey patching."""
-+import flake8
- import pep8
- import pycodestyle
- import pytest
-@@ -6,6 +7,9 @@
- from flake8_polyfill import stdin
- from flake8_polyfill import version
- 
-+if (4, 0, 0) <= flake8.__version_info__:
-+    pytestmark = pytest.mark.skip
-+
- 
- def test_modules_dict():
-     """Verify that it works the way we expect."""