remove commented out config

demo.html

@@ -471,8 +471,6 @@ Reveal.on( 'customevent', function() {
 				center: true,
 				hash: true,
 
-				// disableLayout: true,
-
 				// Learn about plugins: https://revealjs.com/plugins/
 				plugins: [ RevealZoom, RevealNotes, RevealSearch, RevealMarkdown, RevealHighlight ]
 			});