docs: def remove(self, task_name):
          """ Removes an existing task directory.
  
              `task_name`
                  Task name.
  
              Returns ``True`` if removal successful.
              """
  
          try:
              task_dir = self._get_task_dir(task_name)
              shutil.rmtree(task_dir)
              return True
  
          except OSError:
              return False