diff --git a/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/AbstractTraceSegment.java b/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/AbstractTraceSegment.java
deleted file mode 100644
index 7495792e5..000000000
--- a/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/AbstractTraceSegment.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package org.skywalking.apm.trace;
-
-/**
- * @author wusheng
- */
-public interface AbstractTraceSegment {
-}
diff --git a/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/TraceSegment.java b/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/TraceSegment.java
index 9a16e383f..ab79cc159 100644
--- a/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/TraceSegment.java
+++ b/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/TraceSegment.java
@@ -19,7 +19,7 @@ import java.util.List;
  * <p>
  * Created by wusheng on 2017/2/17.
  */
-public class TraceSegment implements AbstractTraceSegment{
+public class TraceSegment {
     private static final String ID_TYPE = "Segment";
 
     /**
diff --git a/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/UnsampleTraceSegment.java b/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/UnsampleTraceSegment.java
deleted file mode 100644
index 2bc774745..000000000
--- a/apm-commons/apm-trace/src/main/java/org/skywalking/apm/trace/UnsampleTraceSegment.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package org.skywalking.apm.trace;
-
-/**
- * @author wusheng
- */
-public class UnsampleTraceSegment {
-}