Remove no-op step

The TouchEvent interface is still exposed.

dom.bs

@@ -5432,14 +5432,6 @@ are:
  <li><p>If <var>constructor</var> is null, then <a>throw</a> a "{{NotSupportedError!!exception}}"
   {{DOMException}}.
 
- <li>
-  <p>If the interface indicated by <var>constructor</var> is not exposed on the
-  <a>relevant global object</a> of <a>this</a>, then <a>throw</a> a
-  "{{NotSupportedError!!exception}}" {{DOMException}}.
-
-  <p class=note>Typically user agents disable support for touch events in some configurations, in
-  which case this clause would be triggered for the interface {{TouchEvent}}.
-
  <li><p>Let <var>event</var> be the result of <a>creating an event</a> given <var>constructor</var>.
 
  <li><p>Initialize <var>event</var>'s {{Event/type}} attribute to the empty string.