diff --git a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/api/context/TracerContext.java b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/api/context/TracerContext.java
index 36acc75cf..35fb6b3f0 100644
--- a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/api/context/TracerContext.java
+++ b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/api/context/TracerContext.java
@@ -7,7 +7,6 @@ import com.a.eye.skywalking.trace.Span;
 import com.a.eye.skywalking.trace.TraceSegment;
 import com.a.eye.skywalking.trace.TraceSegmentRef;
 import com.a.eye.skywalking.trace.tag.Tags;
-import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;