Revert the xfail for Python 3.10

tests/workers/test_geventlet.py

@@ -2,11 +2,6 @@
 #
 # This file is part of gunicorn released under the MIT license.
 # See the NOTICE for more information.
-import pytest
 
-
-@pytest.mark.xfail(
-    reason="TypeError: cannot set 'is_timeout' of immutable type 'TimeoutError'"
-)
 def test_import():
     __import__('gunicorn.workers.geventlet')

tox.ini

@@ -11,7 +11,6 @@ deps =
 [testenv:lint]
 commands =
   pylint -j0 \
-    --disable=consider-using-f-string,consider-using-from-import,consider-using-with,deprecated-method,unspecified-encoding \
     gunicorn \
     tests/test_arbiter.py \
     tests/test_config.py \
@@ -48,4 +47,3 @@ deps =
 
 [pycodestyle]
 max-line-length = 127
-ignore = E122,E126,E128,E129,E226,E302,E303,E501,E722,E741,W291,W293,W503,W504,W606