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 7495792e5d2645c344b12d0913dbd50376c897c6..0000000000000000000000000000000000000000
--- 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 9a16e383f56703e71d2806dfa5193e72209eb50c..ab79cc15907ea66d77a90df53f1600ebaa1cf69c 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 2bc7747450e428735f0fcc88b97b53fe6c8edfbd..0000000000000000000000000000000000000000
--- 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 {
-}