I have a site visualforce page that is loading some unecessary javascript. Specificly the following javascript:

/faces/a4j/g/3_3_3.Finalorg.ajax4jsf.javascript.AjaxScript?rel=1405380279000

I would like to prevent force.com from including this file in the page. Is there anyway to do this? Are there some components that cause this script to be loaded? 

I would also like to prevent this file from loading:

/static/111213/js/perf/stub.js

Any help is appreciated :) 

Cheers,
Scott