Merge pull request #255992 from samuela/samuela/jax

python3Packages.jax: remove pytest-xdist

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

···
 , numpy
 , opt-einsum
 , pytestCheckHook
-, pytest-xdist
 , pythonOlder
 , scipy
 , stdenv
···
     jaxlib'
     matplotlib
     pytestCheckHook
-    pytest-xdist
   ];
-
-  # high parallelism will result in the tests getting stuck
-  dontUsePytestXdist = true;
 
   # NOTE: Don't run the tests in the expiremental directory as they require flax
   # which creates a circular dependency. See https://discourse.nixos.org/t/how-to-nix-ify-python-packages-with-circular-dependencies/14648/2.
   # Not a big deal, this is how the JAX docs suggest running the test suite
   # anyhow.
   pytestFlagsArray = [
-    "--numprocesses=4"
     "-W ignore::DeprecationWarning"
     "tests/"
   ];