- remove futile call

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@8611 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

jme3-model-importer/src/com/jme3/gde/modelimporter/ModelImporterVisualPanel1.java

@@ -119,7 +119,6 @@ public final class ModelImporterVisualPanel1 extends JPanel {
             DialogDisplayer.getDefault().notifyLater(msg);
             Exceptions.printStackTrace(e);
         }
-        manager.setAssetEventListener(null);
         manager.clearCache();
     }