Tidy up test (no need for output)

git-svn-id: https://svn.apache.org/repos/asf/mina/ftpserver/trunk@1129953 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/core/src/test/java/org/apache/ftpserver/clienttests/BindExceptionSerialTest.java b/core/src/test/java/org/apache/ftpserver/clienttests/BindExceptionSerialTest.java
index 2ac6269..2ca5f0b 100644
--- a/core/src/test/java/org/apache/ftpserver/clienttests/BindExceptionSerialTest.java
+++ b/core/src/test/java/org/apache/ftpserver/clienttests/BindExceptionSerialTest.java
@@ -55,14 +55,7 @@
     }
 
     public void testSerialExecution() throws Exception {
-        try {
-            System.out.println("-- call one");
-            System.out.println(Arrays.asList(client.listFiles()));
-            System.out.println("-- call two");
-            System.out.println(Arrays.asList(client.listFiles()));
-        } catch (IOException e) {
-            e.printStackTrace();
-            fail();
-        }
+        assertNotNull(client.listFiles());
+        assertNotNull(client.listFiles());
     }
 }
\ No newline at end of file