Set browser:true in .jshintrc

src/impress.js

@@ -16,10 +16,6 @@
  *  source:  http://github.com/bartaz/impress.js/
  */
 
-/*jshint bitwise:true, curly:true, eqeqeq:true, forin:true, latedef:true, newcap:true,
-         noarg:true, noempty:true, undef:true, strict:true, browser:true */
-/*global window*/
-
 // You are one of those who like to know how things work inside?
 // Let me show you the cogs that make impress.js run...
 ( function( document, window ) {