compiler.cfg.stacks.vacant: fix usings and remove commented out code
compiler.cfg.stacks.vacant: fix usings and remove commented out code

sarvex/factor-lang,bjourne/factor,factor/factor,nicolas-p/factor,bpollack/factor,sarvex/factor-lang,dch/factor,mrjbq7/factor,slavapestov/factor,dch/factor,slavapestov/factor,tgunr/factor,sarvex/factor-lang,factor/factor,bpollack/factor,mrjbq7/factor,AlexIljin/factor,sarvex/factor-lang,mrjbq7/factor,tgunr/factor,sarvex/factor-lang,nicolas-p/factor,mrjbq7/factor,factor/factor,bjourne/factor,AlexIljin/factor,tgunr/factor,mrjbq7/factor,slavapestov/factor,sarvex/factor-lang,bjourne/factor,slavapestov/factor,dch/factor,tgunr/factor,factor/factor,bpollack/factor,tgunr/factor,bpollack/factor,tgunr/factor,AlexIljin/factor,nicolas-p/factor,dch/factor,factor/factor,nicolas-p/factor,nicolas-p/factor,AlexIljin/factor,factor/factor,slavapestov/factor,mrjbq7/factor,slavapestov/factor,bjourne/factor,nicolas-p/factor,AlexIljin/factor,bpollack/factor,nicolas-p/factor,sarvex/factor-lang,bjourne/factor,bpollack/factor,slavapestov/factor,AlexIljin/factor,bjourne/factor,dch/factor,bpollack/factor,dch/factor,AlexIljin/factor,bjourne/factor