diff --git a/backend/app/main_graph/state.py b/backend/app/main_graph/state.py
index 8450f20..585f43d 100644
--- a/backend/app/main_graph/state.py
+++ b/backend/app/main_graph/state.py
@@ -10,11 +10,6 @@ from app.main_graph.graph import add_messages
 from langchain_core.messages import BaseMessage
 
 
-# ========== 兼容性注释（旧代码已移除，状态已整合到 MainGraphState） ==========
-# 旧的 MessagesState 和 GraphContext 已完全整合到 MainGraphState
-# 不再需要单独的类型定义
-
-
 # ========== 新的类型 ==========
 class CurrentAction(Enum):
     """主图当前操作类型"""