Menu: Remove drilldown visual test, broken and superceded by James Rosen's implementation

Author: jzaefferer

tests/visual/index.html

@@ -45,7 +45,6 @@ <h2>Effects</h2>
 		<h2>Menu</h2>
 		<ul>
 			<li><a href="menu/menu.html">General</a></li>
-			<li><a href="menu/drilldown.html">Drilldown</a></li>
 			<li><a href="menu/tablemenu.html">Table-based</a></li>
 		</ul>