Un-deprecate ShadowRoot.p.delegatesFocus (#4508)

whatwg/dom#974 added ShadowRoot.prototype.delegatesFocus
to the DOM spec (see whatwg/dom@f346858). And
per whatwg/dom#931 (comment)
(https://trac.webkit.org/r276585) it’s been implemented in WebKit.

So given that it’s now part of the DOM standard, and implemented in multiple
browsers, this change drops the Deprecated_Header macro from the source — as
well as fixing the spec URL.

Related BCD change: mdn/browser-compat-data#10102

files/en-us/web/api/shadowroot/delegatesfocus/index.html

@@ -3,15 +3,14 @@
 slug: Web/API/ShadowRoot/delegatesFocus
 tags:
 - API
-- Non-standard
 - Property
 - Reference
 - ShadowRoot
 - Web Components
 - delegatesFocus
 - shadow dom
 ---
-<div>{{APIRef("Shadow DOM")}}{{Deprecated_Header}}</div>
+<div>{{APIRef("Shadow DOM")}}</div>
 
 <p>The <strong><code>delegatesFocus</code></strong> read-only property of the
   {{domxref("ShadowRoot")}} interface returns a boolean that indicates whether
@@ -50,10 +49,10 @@ <h2 id="Specifications">Specifications</h2>
   </thead>
   <tbody>
     <tr>
-      <td>{{SpecName('HTML WHATWG',
-        '#shadowroot-delegates-focus', 'delegatesFocus')}}
+      <td>{{SpecName('DOM WHATWG',
+        '#dom-shadowroot-delegatesfocus', 'delegatesFocus')}}
       </td>
-      <td>{{Spec2('HTML WHATWG')}}</td>
+      <td>{{Spec2('DOM WHATWG')}}</td>
       <td></td>
     </tr>
   </tbody>