Bug 1303802 - Disable the part of historical.html which is permaorange on every merge to beta when we disable our rootNode implementation and let the test unexpectedly pass

testing/web-platform/meta/dom/historical.html.ini

@@ -10,5 +10,5 @@
     expected: FAIL
 
   [Node member must be nuked: rootNode]
-    expected: FAIL
+    disabled: https://bugzilla.mozilla.org/show_bug.cgi?id=1303802