Remove unused field

Closes #9
diff --git a/src/main/java/org/apache/maven/shared/model/fileset/util/MessageHolder.java b/src/main/java/org/apache/maven/shared/model/fileset/util/MessageHolder.java
index 81f4814..35de7d5 100644
--- a/src/main/java/org/apache/maven/shared/model/fileset/util/MessageHolder.java
+++ b/src/main/java/org/apache/maven/shared/model/fileset/util/MessageHolder.java
@@ -21,14 +21,10 @@
 
 import java.io.PrintWriter;
 import java.io.StringWriter;
-import java.util.ArrayList;
-import java.util.List;
 
 class MessageHolder
 {
 
-    private List<Message> messages = new ArrayList<Message>();
-
     private Message currentMessage;
 
     private int defaultMessageLevel = MessageLevels.LEVEL_INFO;
@@ -99,7 +95,6 @@
         }
 
         currentMessage = new Message( messageLevel, onDemandSink );
-        messages.add( currentMessage );
     }
 
     private static final class Message