python3Packages.ipykernel: remove superfluous pythonOlder

pkgs/development/python-modules/ipykernel/tests.nix

@@ -2,7 +2,6 @@
   lib,
   stdenv,
   buildPythonPackage,
-  pythonOlder,
   flaky,
   ipykernel,
   ipyparallel,
@@ -45,29 +44,15 @@ buildPythonPackage {
     # traitlets.config.configurable.MultipleInstanceError: An incompatible siblin...
     "test_install_kernelspec"
   ]
-  ++ lib.optionals stdenv.hostPlatform.isDarwin (
-    [
-      # see https://github.com/NixOS/nixpkgs/issues/76197
-      "test_subprocess_print"
-      "test_subprocess_error"
-      "test_ipython_start_kernel_no_userns"
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
+    # see https://github.com/NixOS/nixpkgs/issues/76197
+    "test_subprocess_print"
+    "test_subprocess_error"
+    "test_ipython_start_kernel_no_userns"
 
-      # https://github.com/ipython/ipykernel/issues/506
-      "test_unc_paths"
-    ]
-    ++ lib.optionals (pythonOlder "3.8") [
-      # flaky test https://github.com/ipython/ipykernel/issues/485
-      "test_shutdown"
-
-      # test regression https://github.com/ipython/ipykernel/issues/486
-      "test_sys_path_profile_dir"
-      "test_save_history"
-      "test_help_output"
-      "test_write_kernel_spec"
-      "test_ipython_start_kernel_userns"
-      "ZMQDisplayPublisherTests"
-    ]
-  );
+    # https://github.com/ipython/ipykernel/issues/506
+    "test_unc_paths"
+  ];
 
   # Some of the tests use localhost networking.
   __darwinAllowLocalNetworking = true;