Add PR number to make lint happy

Author: StanFromIreland

Doc/whatsnew/3.15.rst

@@ -229,7 +229,7 @@ sre_*
 -----
 
 * Removed :mod:`!sre_compile`, :mod:`!sre_constants` and :mod:`!sre_parse` modules.
-  (Contributed by Stan Ulbrych in :gh:``.)
+  (Contributed by Stan Ulbrych in :gh:`135994`.)
 
 
 http.server

Lib/test/test_pyclbr.py

@@ -11,7 +11,6 @@
 import pyclbr
 from unittest import TestCase, main as unittest_main
 from test.test_importlib import util as test_importlib_util
-import warnings
 
 
 StaticMethodType = type(staticmethod(lambda: None))

Lib/test/test_re.py

@@ -5,7 +5,6 @@
 import locale
 import re
 import string
-import sys
 import unittest
 import warnings
 from re import Scanner