They aren't required for css, that is right. But they are required for something your designer has made for you, which is part of your layout and thus of the css work your designer has done for you, best is to contact him and get some information about it.
If you want to have a faster page load, use a caching plugin if possible (using wordpress?). Jquery from google cdn is cached on most browsers already so this won't slow your site down so much.