Finished Arrow, Title and StartController scene splitting

- scenes do not load in at the same time
- scenes do not rely upon previous abstract controller class
- scenes are not a part of previous main controller class
- unecessary functions and code removed

#story[1261]

racevisionGame/src/main/java/shared/model/RaceClock.java

@@ -3,6 +3,7 @@ package shared.model;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import org.jetbrains.annotations.Nullable;
+import visualiser.Controllers2.StartController;
 import visualiser.model.ResizableRaceCanvas;
 
 import java.time.Duration;
@@ -16,7 +17,7 @@ import java.util.Date;
  * displays times relevant to a race. This is displayed on the
  * {@link ResizableRaceCanvas} via the
  * {@link visualiser.Controllers.RaceController} and the
- * {@link visualiser.Controllers.StartController}.
+ * {@link StartController}.
  */
 public class RaceClock {