Remove unnecessary clone

VadereSimulator/src/org/vadere/simulator/projects/Scenario.java

@@ -143,13 +143,11 @@ public class Scenario {
 
 	@Override
 	public Scenario clone() {
-		Scenario clonedScenario = null;
 		try {
-			clonedScenario = JsonConverter.cloneScenarioRunManager(this);
+			return JsonConverter.cloneScenarioRunManager(this);
 		} catch (IOException | VadereClassNotFoundException e) {
-			logger.error(e);
+			throw new RuntimeException(e);
 		}
-		return clonedScenario;
 	}
 
 	@Override

VadereSimulator/src/org/vadere/simulator/projects/VadereProject.java

@@ -146,7 +146,7 @@ public class VadereProject implements ScenarioFinishedListener {
 	}
 
 	private ScenarioRun prepareNextScenario() {
-		final Scenario nextScenario = scenariosLeft.remove().clone(); // TODO why clone? scenario should not be changed during a simulation run
+		final Scenario nextScenario = scenariosLeft.remove();
 
 		notifySingleScenarioFinishListener(nextScenario);