diff --git a/LFlow.Base/App.cs b/LFlow.Base/App.cs
index 8a68a49..ede7f13 100644
--- a/LFlow.Base/App.cs
+++ b/LFlow.Base/App.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace LFlow.Base;
 /// <summary>
 /// 程序对象