bioentites added twice caused inconsistency among multiple runs

converter/src/main/java/lcsb/mapviewer/converter/ZIndexPopulator.java

@@ -40,7 +40,6 @@ public class ZIndexPopulator {
     int maxZIndex = 0;
 
     List<Drawable> bioEntities = new ArrayList<>();
-    bioEntities.addAll(model.getBioEntities());
     for (Layer layer : model.getLayers()) {
       bioEntities.addAll(layer.getOvals());
       bioEntities.addAll(layer.getRectangles());