Revert "Merge #97847 python27Packages.anytree: fix build"

Moving to staging.  It's a really large rebuild.
This reverts commit 9a8bd1e, reversing
changes made to 9866abf.

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

@@ -1,15 +1,13 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, pythonOlder
 , substituteAll
+, fetchpatch
+, nose
 , six
 , withGraphviz ? true
 , graphviz
 , fontconfig
-# Tests
-, pytestCheckHook
-, nose
 }:
 
 buildPythonPackage rec {
@@ -28,6 +26,10 @@ buildPythonPackage rec {
     })
   ];
 
+  checkInputs = [
+    nose
+  ];
+
   propagatedBuildInputs = [
     six
   ];
@@ -40,13 +42,13 @@ buildPythonPackage rec {
   # circular dependency anytree → graphviz → pango → glib → gtk-doc → anytree
   doCheck = withGraphviz;
 
-  checkInputs = [ pytestCheckHook nose ];
+  checkPhase = ''
+    runHook preCheck
 
-  pytestFlagsArray = lib.optionals (pythonOlder "3.4") [
-    # Use enums, which aren't available pre-python3.4
-    "--ignore=tests/test_resolver.py"
-    "--ignore=tests/test_search.py"
-  ];
+    nosetests
+
+    runHook postCheck
+  '';
 
   meta = with lib; {
     description = "Powerful and Lightweight Python Tree Data Structure";