concurrency.count-downs: remove unused dependency on debugger vocab
concurrency.count-downs: remove unused dependency on debugger vocab

mcandre/factor,erg/factor,erg/factor,erg/factor,erg/factor,mcandre/factor,mcandre/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,erg/factor