fix clear_crontab task so it will work both standalone and during deploy
fix clear_crontab task so it will work both standalone and during deploy

mindvalley/whenever,rafaelsales/whenever,medictrust/whenever,Insomniware/whenever,erikdahlstrand/whenever,lzheng571/whenever,betesh/whenever,javan/whenever,thehungrycoder/whenever,HonoreDB/whenever,bangwu/whenever,TechieDev/whenever,Nguyenanh/whenever,attilahorvath/whenever,stpn/whenever,Dearest/whenever,sideci-sample/sideci-sample-whenever,shtzr840329/whenever,ThomasPr/whenever,makandra/whenever,ctokoro/whenever,bernabas/whenever