python3Packages.celery: remove pytest-xdist do to flaky test results (#516843)

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

@@ -34,7 +34,6 @@
   pytest-celery,
   pytest-click,
   pytest-timeout,
-  pytest-xdist,
   pytestCheckHook,
   python-dateutil,
   python-memcached,
@@ -156,11 +155,6 @@ buildPythonPackage (finalAttrs: {
     pytest-timeout
     pytestCheckHook
   ]
-  ++ lib.optionals stdenv.hostPlatform.isLinux [
-    # Using `pytest-xdist` leads to incomplete tests which hang `pytestRemoveBytecode`
-    # under `sandbox=false` (the default on Darwin).
-    pytest-xdist
-  ]
   ++ lib.concatAttrValues finalAttrs.passthru.optional-dependencies;
 
   disabledTestPaths = [