Remove unused submit_tasks function on server
Remove unused submit_tasks function on server

umbrant/dist_test,xiao-chen/dist_test,cloudera/dist_test,umbrant/dist_test,umbrant/dist_test,cloudera/dist_test,cloudera/dist_test,umbrant/dist_test,cloudera/dist_test,xiao-chen/dist_test,xiao-chen/dist_test,xiao-chen/dist_test