Hi Ralph,
this would be very complicated as most of the scripts (and viewstate) comes from ASP.NET controls that are used to generate the web page you are sending as the dynamic newsletter. You might get rid of some of them using a custom code, but I do not see an easy way to remove them all. In such scenario, you may consider using the classic Newsletters with custom macros taking care of some advanced content, but if you are using complex content, this may also take a lot of time.