remove a couple lines of js that are no longer relevant

This `$('.g5-enhanced-form .config:first')` doesn't actually exist anywhere anymore that I can find. 

And, as far as I can tell, we declare and assign this `clientUrn` variable, and never use it within it's scope. So, there's no way we could actually be using these two lines for anything... Right?

The only thing those lines ever do (as far as I can tell) is throw JS errors.