There is not, JSmin (which is the js minifier used in AO) always preservers comments that start with "/*!" which usually contain license information.
Now if you're into coding, you could use Autoptimize API's "autoptimize_js_after_minify" filter to go over the JS after minification and remove those "protected comments" yourself. Don't expect big performance gains from that though ;-)
hope this helps,
frank