diff --git a/designer-base/src/main/java/com/fr/design/upm/UpmBridge.java b/designer-base/src/main/java/com/fr/design/upm/UpmBridge.java
index 7f36c2b8d9..6a4b752fd1 100644
--- a/designer-base/src/main/java/com/fr/design/upm/UpmBridge.java
+++ b/designer-base/src/main/java/com/fr/design/upm/UpmBridge.java
@@ -43,7 +43,6 @@ import java.util.List;
 import java.util.concurrent.Callable;
 import java.util.concurrent.FutureTask;
 import java.util.concurrent.RunnableFuture;
-import java.util.concurrent.TimeUnit;
 
 /**
  * @author richie