remove redundant application config (#324)

diff --git a/dubbo-samples-monitor/src/test/java/org/apache/dubbo/samples/monitor/MonitorServiceIT.java b/dubbo-samples-monitor/src/test/java/org/apache/dubbo/samples/monitor/MonitorServiceIT.java
index db6f1cd..fea626a 100644
--- a/dubbo-samples-monitor/src/test/java/org/apache/dubbo/samples/monitor/MonitorServiceIT.java
+++ b/dubbo-samples-monitor/src/test/java/org/apache/dubbo/samples/monitor/MonitorServiceIT.java
@@ -45,7 +45,6 @@
     @Test
     public void test() throws Exception {
         ReferenceConfig<MonitorService> reference = new ReferenceConfig<>();
-        reference.setApplication(new ApplicationConfig("demo-monitor"));
         reference.setRegistry(new RegistryConfig("zookeeper://" + zookeeperHost + ":2181"));
         reference.setInterface(MonitorService.class);
         reference.setFilter("-monitor");