Unused KdTreeBuiltEvent deleted

Comparison/src/main/java/cz/fidentis/analyst/face/KdTreeBuiltEvent.java

-package cz.fidentis.analyst.face;
-
-import cz.fidentis.analyst.kdtree.KdTree;
-import cz.fidentis.analyst.kdtree.KdTreeEvent;
-
-/**
- * Event indicating that a new kd-tree has been buit.
- * The old tree is stored in the event.
- * 
- * @author Radek Oslejsek
- */
-public class KdTreeBuiltEvent implements KdTreeEvent {
-    
-    private KdTree oldTree;
-    
-    /**
-     * 
-     * @param oldTree Old kd-tree. Can be {@code null}
-     */
-    public KdTreeBuiltEvent(KdTree oldTree) {
-        this.oldTree = oldTree;
-    }
-
-    public KdTree getOldTree() {
-        return oldTree;
-    }
-}