remove xfail from known words again

dirk-thomas · rotu · commit efde854c8a5d · 2019-09-19T17:36:46.000-05:00
diff --git a/test/spell_check.words b/test/spell_check.words
@@ -52,4 +52,3 @@ tuples
 unlinking
 veyor
 wildcards
-xfail
