remove parallax config

demo.html

@@ -421,11 +421,6 @@ Reveal.addEventListener( 'customevent', function() {
 				center: true,
 				hash: true,
 
-				// parallaxBackgroundImage: "https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg",
-
-				// Parallax background size
-				// parallaxBackgroundSize: "2100px 900px",
-
 				transition: 'slide', // none/fade/slide/convex/concave/zoom
 
 				// More info https://github.com/hakimel/reveal.js#dependencies