timers: simplify stop-timer.
timers: simplify stop-timer.

factor/factor,mrjbq7/factor,AlexIljin/factor,bpollack/factor,factor/factor,bpollack/factor,mrjbq7/factor,mrjbq7/factor,tgunr/factor,AlexIljin/factor,AlexIljin/factor,mrjbq7/factor,bpollack/factor,bpollack/factor,bpollack/factor,tgunr/factor,AlexIljin/factor,mrjbq7/factor,bpollack/factor,tgunr/factor,factor/factor,tgunr/factor,factor/factor,tgunr/factor,factor/factor,mrjbq7/factor,AlexIljin/factor,factor/factor,AlexIljin/factor,bpollack/factor,AlexIljin/factor,tgunr/factor