Dialog demo: Remove regular modal demo, the other modal demos are better

Author: jzaefferer

demos/dialog/index.html

@@ -10,7 +10,6 @@
 <ul>
 	<li><a href="default.html">Default functionality</a></li>
 	<li><a href="animated.html">Animated dialog</a></li>
-	<li><a href="modal.html">Modal dialog</a></li>
 	<li><a href="modal-message.html">Modal message</a></li>
 	<li><a href="modal-confirmation.html">Modal confirmation</a></li>
 	<li><a href="modal-form.html">Modal form</a></li>