Remove reference to <input type=range multiple>

This feature was removed in #1557, but it was still referenced as a
focusable areas example.

source

@@ -72249,10 +72249,9 @@ END:VCARD</pre>
      <td headers="td-fa-3 th-fa-examples" colspan=2>
      <p class="example">The <span data-x="expose a user interface to the user">controls in the user
      interface</span> for a <code>video</code> element, the up and down buttons in a spin-control
-     version of <code data-x="attr-input-type-number">&lt;input type=number></code>, the two range
-     control widgets in an <code data-x="attr-input-type-range">&lt;input type=range
-     multiple></code>, the part of a <code>details</code> element's rendering that enables the
-     element to be opened or closed using keyboard input.</p>
+     version of <code data-x="attr-input-type-number">&lt;input type=number></code>, the part of a
+     <code>details</code> element's rendering that enables the element to be opened or closed using
+     keyboard input.</p>
 
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