@@ -, +, @@ 
 regarding its old usage.
---
 .../jmeter/visualizers/MailerVisualizer.java       |  6 ----
 .../apache/jmeter/visualizers/ModelListener.java   | 42 ----------------------
 2 files changed, 48 deletions(-)
 delete mode 100644 src/components/org/apache/jmeter/visualizers/ModelListener.java
--- a/src/components/org/apache/jmeter/visualizers/MailerVisualizer.java	
+++ a/src/components/org/apache/jmeter/visualizers/MailerVisualizer.java	
@@ -397,12 +397,6 @@ public class MailerVisualizer extends AbstractVisualizer implements ActionListen
         mailerModel.setToAddress(addressField.getText());
     }
 
-    // ////////////////////////////////////////////////////////////
-    //
-    // Methods to implement the ModelListener.
-    //
-    // ////////////////////////////////////////////////////////////
-
     /**
      * Notifies this Visualizer about model-changes. Causes the Visualizer to
      * query the model about its new state.
--- a/src/components/org/apache/jmeter/visualizers/ModelListener.java	
+++ a/src/components/org/apache/jmeter/visualizers/ModelListener.java	
@@ -1,42 +0,0 @@ 
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package org.apache.jmeter.visualizers;
-
-/**
- * The Interface to be implemented by any class that wants to be notified by
- * model which makes use of this callback-Interface.
- *
- */
-public interface ModelListener {
-
-    /**
-     * Informs the Visualizer that the model has changed.
-     */
-    void updateVisualizer();
-
-    /**
-     * Informs the Visualizer that a message should be displayed.
-     * 
-     * @param messageString
-     *            The text to be displayed
-     * @param isError
-     *            Flag whether this message represents an error
-     */
-    void displayMessage(String messageString, boolean isError);
-}
--