Fix duplicate line of code in README

Author: shouze

README.md

@@ -40,7 +40,6 @@ var parameters = {/* ... */}
 
 var container = SkippyFactory.create(services, parameters);
 
-var fooServiceInstance = container.getService('foo');
 var fooServiceInstance = container.getService('foo');
 
 var barParameterValue = container.getParameter('bar');