Remove dependency on the ClassLoader component.

composer.json

@@ -18,7 +18,6 @@
         "php": ">=5.3.3",
         "pimple/pimple": "1.*",
         "symfony/browser-kit": "2.1.*",
-        "symfony/class-loader": "2.1.*",
         "symfony/css-selector": "2.1.*",
         "symfony/dom-crawler": "2.1.*",
         "symfony/event-dispatcher": "2.1.*",