diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/util/TraceIdGenerator.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/util/TraceIdGenerator.java
index 64f0bf6fb..1fc259806 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/util/TraceIdGenerator.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/util/TraceIdGenerator.java
@@ -1,7 +1,5 @@
 package com.ai.cloud.skywalking.util;
 
-import java.util.HashMap;
-import java.util.Random;
 import java.util.UUID;
 
 public final class TraceIdGenerator {