Clean up definition of garbage collection task source

Author: littledan

source

@@ -89627,15 +89627,11 @@ dictionary <dfn>PromiseRejectionEventInit</dfn> : <span>EventInit</span> {
   User agents must use the following implementation: <ref spec=JSWEAKREF></p>
 
   <ol>
-   <li><p><span>Queue a task</span> on the <span>garbage collection task source</span> to perform
+   <li><p><span>Queue a task</span> on the <dfn>garbage collection task source</dfn> to perform
    <span>CleanupFinalizationGroup</span>(<var>finalizationGroup</var>). If this throws an exception,
    catch it, and <span>report the exception</span>.</p></li>
   </ol>
 
-  <p>The <span>task source</span> for any <span data-x="concept-task">tasks</span> that are <span
-  data-x="queue a task">queued</span> in this section is the <dfn>garbage collection task
-  source</dfn>.</p>
-
   </div>
 
   <h4>Event loops</h4> <!-- <dfn>event loop</dfn> -->