Bug 1745199 - Remove more stale metadata, a=testonly CLOSED TREE

Differential Revision: https://phabricator.services.mozilla.com/D134298

testing/web-platform/meta/dom/idlharness.window.js.ini

@@ -6,9 +6,3 @@
 
   [Stringification of document.createNSResolver(document.body)]
     expected: FAIL
-
-  [AbortSignal interface: attribute reason]
-    expected: FAIL
-
-  [AbortSignal interface: new AbortController().signal must inherit property "reason" with the proper type]
-    expected: FAIL