Partly resolves "Implement state copy in AST"

eraser.spark/src/main/java/de/tudresden/inf/st/eraser/spark/Application.java

@@ -241,7 +241,6 @@ public class Application {
     return SimpleItem.of(item.getID(),
         item.getLabel(),
         item.getTopic() != null ? item.getTopic().getTopicString() : null,
-        item.isFrozen(),
         item.isSendState(),
         wrapMetaData(item.getMetaDataList()));
   }