removed unused stop() from job_queue
removed unused stop() from job_queue

pavlobaron/disco_playground,scrapinghub/disco,pavlobaron/disco_playground,scrapinghub/disco,simudream/disco,oldmantaiter/disco,mwilliams3/disco,oldmantaiter/disco,ktkt2009/disco,ErikDubbelboer/disco,pooya/disco,mwilliams3/disco,simudream/disco,ErikDubbelboer/disco,pombredanne/disco,simudream/disco,discoproject/disco,seabirdzh/disco,scrapinghub/disco,ktkt2009/disco,pombredanne/disco,pavlobaron/disco_playground,oldmantaiter/disco,discoproject/disco,ktkt2009/disco,ErikDubbelboer/disco,mwilliams3/disco,mozilla/disco,simudream/disco,seabirdzh/disco,pombredanne/disco,beni55/disco,ErikDubbelboer/disco,beni55/disco,pavlobaron/disco_playground,simudream/disco,seabirdzh/disco,pooya/disco,beni55/disco,mozilla/disco,mwilliams3/disco,oldmantaiter/disco,discoproject/disco,beni55/disco,scrapinghub/disco,seabirdzh/disco,ktkt2009/disco,mozilla/disco,ktkt2009/disco,mozilla/disco,mwilliams3/disco,seabirdzh/disco,discoproject/disco,discoproject/disco,pooya/disco,pooya/disco,pombredanne/disco,oldmantaiter/disco,pombredanne/disco,beni55/disco,ErikDubbelboer/disco