test: remove xfail for nested_complement on Windows

... it goes fine now (with utf8)

Author: dvp

tests/test_travis.py

@@ -35,13 +35,10 @@
             "-u -5942",
             "i3",
         ),
-        pytest.param(
+        (
             "remh",
             "",
             "nested_complement",
-            marks=pytest.mark.xfail(
-                sys.platform == "win32", reason="Need more efforts on parser testing"
-            ),
         ),
     ],
 )