gall: gut some unused stuff
gall: gut some unused stuff

Gets rid of 'voltage', 'security-control', and 'privilege', all of which
were either superfluous or were not actually used anywhere.

jfranklin9000/urbit,jfranklin9000/urbit,urbit/urbit,urbit/urbit,urbit/urbit,ngzax/urbit,jfranklin9000/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,urbit/urbit,ngzax/urbit,urbit/urbit,jfranklin9000/urbit,ngzax/urbit,jfranklin9000/urbit,jfranklin9000/urbit,urbit/urbit,jfranklin9000/urbit