python310Packages.backports_functools_lru_cache: switch to pytestCheckHook, remove linters

pkgs/development/python-modules/backports_functools_lru_cache/default.nix

···
 , fetchPypi
 , setuptools-scm
 , isPy3k
-, pytest
-, pytest-black
-, pytest-flake8
-, pytest-cov
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
···
 
   nativeBuildInputs = [ setuptools-scm ];
 
-  checkInputs = [ pytest pytest-flake8 pytest-black pytest-cov ];
-  # ironically, they fail a linting test, and pytest.ini forces that test suite
-  checkPhase = ''
-    rm backports/functools_lru_cache.py
-    pytest -k 'not format'
-  '';
+  checkInputs = [ pytestCheckHook ];
 
   # Test fail on Python 2
   doCheck = isPy3k;

pkgs/development/python-modules/portend/black-19.10b0.patch

···
-diff --git a/test_portend.py b/test_portend.py
-index b2de8c2..3f90276 100644
---- a/test_portend.py
-+++ b/test_portend.py
-@@ -21,7 +21,7 @@ def socket_infos():
- 
- 
- def id_for_info(info):
--    af, = info[:1]
-+    (af,) = info[:1]
-     return str(af)
- 
-