diff --git a/async/src/main/java/name/guolanren/AsyncApplication.java b/async/src/main/java/name/guolanren/AsyncApplication.java
index 63a9fac..955d097 100644
--- a/async/src/main/java/name/guolanren/AsyncApplication.java
+++ b/async/src/main/java/name/guolanren/AsyncApplication.java
@@ -8,8 +8,6 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
-import java.util.ArrayList;
-import java.util.List;
 import java.util.concurrent.CompletableFuture;
 
 /**