remove spatial audio menu items

This PR removes the Spatial audio menus, but leaves the code in the interface otherwise intact. And uses all the "default options". 

The goal is to declutter the menus, and remove the potential for accidentally selecting these menu options. But not completely removing the audio reflector code. (YET... follow up will be to determine what to do with this reflector code)
Do we want to keep the commented out section of this line?