Editorial: remove structured cloning section

w3c/ServiceWorker#313 was closed long
ago and it hasn’t really come up since.

Overview.html

@@ -99,9 +99,8 @@ <h2 class="no-num no-toc" id="table-of-contents">Table of Contents</h2>
    <li><a href="#body-mixin"><span class="secno">6.2 </span>Body mixin</a></li>
    <li><a href="#request-class"><span class="secno">6.3 </span>Request class</a></li>
    <li><a href="#response-class"><span class="secno">6.4 </span>Response class</a></li>
-   <li><a href="#structured-cloning-of-headers,-request,-and-response-objects"><span class="secno">6.5 </span>Structured cloning of <code>Headers</code>, <code>Request</code>, and <code>Response</code> objects</a></li>
-   <li><a href="#fetch-method"><span class="secno">6.6 </span>Fetch method</a></li>
-   <li><a href="#garbage-collection"><span class="secno">6.7 </span>Garbage collection</a></ol></li>
+   <li><a href="#fetch-method"><span class="secno">6.5 </span>Fetch method</a></li>
+   <li><a href="#garbage-collection"><span class="secno">6.6 </span>Garbage collection</a></ol></li>
  <li><a href="#websocket-protocol"><span class="secno">7 </span>WebSocket protocol alterations</a>
   <ol>
    <li><a href="#websocket-connections"><span class="secno">7.1 </span>Connections</a></li>
@@ -5221,14 +5220,7 @@ <h3 id="response-class"><span class="secno">6.4 </span>Response class</h3>
 </ol>
 
 
-<h3 id="structured-cloning-of-headers,-request,-and-response-objects"><span class="secno">6.5 </span>Structured cloning of <a href="#headers"><code>Headers</code></a>, <a href="#request"><code>Request</code></a>, and <a href="#response"><code>Response</code></a> objects</h3>
-
-<p class="note">Unlikely to happen anytime soon due to difficulty of cloning promises and
-streams. See <a href="https://github.com/slightlyoff/ServiceWorker/issues/313">SW #313</a>
-for details.
-
-
-<h3 id="fetch-method"><span class="secno">6.6 </span>Fetch method</h3>
+<h3 id="fetch-method"><span class="secno">6.5 </span>Fetch method</h3>
 
 <pre class="idl">partial interface <a class="external" data-anolis-spec="html" href="https://html.spec.whatwg.org/multipage/webappapis.html#windoworworkerglobalscope">WindowOrWorkerGlobalScope</a> {
   [NewObject] Promise&lt;<a href="#response">Response</a>&gt; <a href="#dom-global-fetch" title="dom-global-fetch">fetch</a>(<a href="#requestinfo">RequestInfo</a> <var>input</var>, optional <a href="#requestinit">RequestInit</a> <var>init</var>);
@@ -5286,7 +5278,7 @@ <h3 id="fetch-method"><span class="secno">6.6 </span>Fetch method</h3>
 </ol>
 
 
-<h3 id="garbage-collection"><span class="secno">6.7 </span>Garbage collection</h3>
+<h3 id="garbage-collection"><span class="secno">6.6 </span>Garbage collection</h3>
 
 <p>The user agent may <a href="#concept-fetch-terminate" title="concept-fetch-terminate">terminate</a> an ongoing fetch with
 reason <i title="">garbage collection</i> if that termination is not observable through script.

Overview.src.html

@@ -5149,13 +5149,6 @@ <h3>Response class</h3>
 </ol>
 
 
-<h3>Structured cloning of <code>Headers</code>, <code>Request</code>, and <code>Response</code> objects</h3>
-
-<p class=note>Unlikely to happen anytime soon due to difficulty of cloning promises and
-streams. See <a href="https://github.com/slightlyoff/ServiceWorker/issues/313">SW #313</a>
-for details.
-
-
 <h3>Fetch method</h3>
 
 <pre class=idl>partial interface <span data-anolis-spec=html>WindowOrWorkerGlobalScope</span> {