Deleted redundant and deprecated code (Visualiser)

- References to deprecated objects replaced
- Deprecated Constants class removed
- general redundant code deleted

visualiser/src/main/java/seng302/Model/ResizableRaceCanvas.java

@@ -5,7 +5,6 @@ import javafx.collections.ObservableList;
 import javafx.scene.paint.Color;
 import javafx.scene.paint.Paint;
 import javafx.scene.transform.Rotate;
-import seng302.GPSCoordinate;
 import seng302.GraphCoordinate;
 import seng302.Mock.StreamedCourse;
 import seng302.RaceDataSource;