Refactor: Delete useless class

CityDoctorParent/CityDoctorValidation/src/main/java/de/hft/stuttgart/citydoctor2/check/CheckerThreadsSynchronizer.java

-package de.hft.stuttgart.citydoctor2.check;
-
-import de.hft.stuttgart.citydoctor2.datastructure.CityDoctorModel;
-import de.hft.stuttgart.citydoctor2.datastructure.CityObject;
-import de.hft.stuttgart.citydoctor2.datastructure.GmlId;
-import de.hft.stuttgart.citydoctor2.parser.ProgressListener;
-
-import java.util.EmptyStackException;
-import java.util.Stack;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.locks.ReentrantLock;
-
-public class CheckerThreadsSynchronizer {
-
-
-    private AtomicInteger checkedCount = new AtomicInteger(0);
-    private final float featureCount;
-    private CityDoctorModel model;
-    private ProgressListener listener;
-    private ReentrantLock lock = new ReentrantLock();
-    private Stack<GmlId> ids;
-
-    public CheckerThreadsSynchronizer(CityDoctorModel model, ProgressListener listener) {
-        this.model = model;
-        this.listener = listener;
-        featureCount = model.getNumberOfFeatures();
-        ids = new Stack<>();
-        ids.addAll(model.getFeatureIds());
-    }
-
-    public CityObject getNext() {
-//      lock.lock();
-//      try {
-          if (!ids.isEmpty()){
-              return model.getCache().get(ids.pop());
-          }
-          return null;
-//      } finally {
-//          lock.unlock();
-//      }
-    };
-
-    public void updateFeature(CityObject feature) {
-        model.getCache().put(feature);
-    }
-
-    public boolean hasNext(){
-//        lock.lock();
-        try {
-            ids.peek();
-            return true;
-        } catch (EmptyStackException e) {
-            return false;
-        } finally {
-//            lock.unlock();
-        }
-    }
-
-    public void updateCheckedCount(){
-        checkedCount.getAndIncrement();
-        if (listener!=null){
-            listener.updateProgress(checkedCount.get() / featureCount);
-        }
-    }
-
-}