simplify default initialization options

index.html

@@ -387,12 +387,7 @@ function linkify( selector ) {
 				history: true,
 				center: true,
 
-				theme: Reveal.getQueryHash().theme, // available themes are in /css/theme
-				transition: Reveal.getQueryHash().transition || 'default', // none/fade/slide/convex/concave/zoom
-
-				// Parallax scrolling
-				// parallaxBackgroundImage: 'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg',
-				// parallaxBackgroundSize: '2100px 900px',
+				transition: 'slide', // none/fade/slide/convex/concave/zoom
 
 				// Optional libraries used to extend on reveal.js
 				dependencies: [