tools.cal: remove tests.
tools.cal: remove tests.

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