remove unsused code

src/main/java/fr/soleil/archiving/hdbtdb/api/management/attributes/hdb/insert/SynchronChronometer.java

-package fr.soleil.archiving.hdbtdb.api.management.attributes.hdb.insert;
-
-/**
- * A {@link Chronometer} with synchronized methods
- * 
- * @author GIRARDOT
- */
-public class SynchronChronometer extends Chronometer {
-
-    @Override
-    public synchronized void start(long duration) {
-        super.start(duration);
-    }
-
-    @Override
-    public synchronized void stop() {
-        super.stop();
-    }
-
-    @Override
-    public synchronized boolean isOver() {
-        return super.isOver();
-    }
-
-}