removed converting method name to method inside `flush`
removed converting method name to method inside `flush`

since all scheduling methods (scheduleOnce and schedule) in backburner
already do method name to method conversion there no need for another one

ebryn/backburner.js,BackburnerJS/backburner.js,BackburnerJS/backburner.js,ebryn/backburner.js,BackburnerJS/backburner.js