diff --git a/samples/skywalking-example/resources-application/resource-impl/src/main/java/com/ai/cloud/skywalking/example/resource/dubbo/util/DubboStart.java b/samples/skywalking-example/resources-application/resource-impl/src/main/java/com/ai/cloud/skywalking/example/resource/dubbo/util/DubboStart.java
deleted file mode 100644
index 5625d5729..000000000
--- a/samples/skywalking-example/resources-application/resource-impl/src/main/java/com/ai/cloud/skywalking/example/resource/dubbo/util/DubboStart.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package com.ai.cloud.skywalking.example.resource.dubbo.util;
-
-public class DubboStart {
-
-    public static void main(String[] args) {
-
-    }
-}
diff --git a/skywalking-example/web-application/src/main/java/com/ai/cloud/skywalking/example/web/SaveOrderServlet.java b/skywalking-example/web-application/src/main/java/com/ai/cloud/skywalking/example/web/SaveOrderServlet.java
deleted file mode 100644
index a5e8060b9..000000000
--- a/skywalking-example/web-application/src/main/java/com/ai/cloud/skywalking/example/web/SaveOrderServlet.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.ai.cloud.skywalking.example.web;
-
-/**
- * Created by astraea on 2015/11/26.
- */
-public class SaveOrderServlet {
-}
diff --git a/skywalking-example/web-application/src/main/webapp/WEB-INF/web.xml b/skywalking-example/web-application/src/main/webapp/WEB-INF/web.xml
deleted file mode 100644
index e69de29bb..000000000