python.pkgs.pyrsistent: remove obsolete patch

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

@@ -20,9 +20,6 @@ buildPythonPackage rec {
 
   checkInputs = [ pytestrunner pytest hypothesis ];
 
-  # pytestrunner is only needed to run tests
-  patches = [ ./no-setup-requires-pytestrunner.patch ];
-
   meta = with stdenv.lib; {
     homepage = https://github.com/tobgu/pyrsistent/;
     description = "Persistent/Functional/Immutable data structures";

pkgs/development/python-modules/pyrsistent/no-setup-requires-pytestrunner.patch

@@ -1,15 +0,0 @@
-diff --git a/setup.py b/setup.py
-index 90a39a5..7bf444f 100644
---- a/setup.py
-+++ b/setup.py
-@@ -77,9 +77,8 @@ setup(
-         'Programming Language :: Python :: Implementation :: PyPy',
-     ],
-     test_suite='tests',
--    tests_require=['pytest','hypothesis'],
-+    tests_require=['pytest-runner', 'pytest','hypothesis'],
-     scripts=[],
--    setup_requires=['pytest-runner'],
-     ext_modules=extensions,
-     cmdclass={'build_ext': custom_build_ext},
-     install_requires=['six'],