fix: no attribute bug

Author: tangg555

src/memos/mem_scheduler/task_schedule_modules/dispatcher.py

@@ -129,8 +129,6 @@ def status_tracker(self) -> TaskStatusTracker | None:
             try:
                 self._status_tracker = TaskStatusTracker(self.redis)
                 # Propagate to submodules when created lazily
-                if self.dispatcher:
-                    self.dispatcher.status_tracker = self._status_tracker
                 if self.memos_message_queue:
                     self.memos_message_queue.set_status_tracker(self._status_tracker)
             except Exception as e: