Remove inaccurate fieldset ref in HTMLFormControlsCollection

As of 934887d, <fieldset> no
longer utilizes HTMLFormControlsCollection.

PR: #492

source

@@ -7228,7 +7228,7 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <p>The <code>HTMLFormControlsCollection</code> interface is used for
   <span data-x="concept-collection">collections</span> of <span data-x="category-listed">listed
-  elements</span> in <code>form</code> and <code>fieldset</code> elements.</p>
+  elements</span> in <code>form</code> elements.</p>
 
   <pre class="idl">interface <dfn>HTMLFormControlsCollection</dfn> : <span>HTMLCollection</span> {
   // inherits <span data-x="dom-HTMLCollection-length">length</span> and <span data-x="dom-HTMLCollection-item">item</span>()
@@ -117753,6 +117753,7 @@ INSERT INTERFACES HERE
   Cole Robison,
   Colin Fine,
   Collin Jackson,
+  Corey Farwell,
   Corprew Reed,
   Craig Cockburn,
   Csaba Gabor,