Refactoring AbstractTask: remove unused methods "done", "order_date", "todo_count".
Refactoring AbstractTask: remove unused methods "done", "order_date", "todo_count".

xuewenfei/jobsworth,digitalnatives/jobsworth,webstream-io/jobsworth,ari/jobsworth,rafaspinola/jobsworth,digitalnatives/jobsworth,xuewenfei/jobsworth,xuewenfei/jobsworth,webstream-io/jobsworth,ari/jobsworth,ari/jobsworth,rafaspinola/jobsworth,rafaspinola/jobsworth,webstream-io/jobsworth,digitalnatives/jobsworth,xuewenfei/jobsworth,ari/jobsworth,digitalnatives/jobsworth,digitalnatives/jobsworth,webstream-io/jobsworth,rafaspinola/jobsworth