public void removeTaskFromQueue(String taskId) {
        Task task = getTask(taskId);
        if (task == null) {
            throw new NotFoundException("No such task found by taskId: %s", taskId);
        }
        queueDAO.remove(QueueUtils.getQueueName(task), taskId);
    }
This method removes the task from the un-acked Queue

@param taskId: the taskId that needs to be updated and removed from the unacked queue
@return True in case of successful removal of the taskId from the un-acked queue
core/src/main/java/com/netflix/conductor/service/ExecutionService.java