Fixed juttery movements when zooming and sometimes tracking.

Need to look into getting the boat propery fixed in the center.

#story[1121]

src/main/java/seng302/visualiser/GameClient.java

@@ -229,7 +229,6 @@ public class GameClient {
                     positionData.getLon(), positionData.getHeading(),
                     positionData.getGroundSpeed());
             }
-            raceView.getGameView().trackBoat();
         } else if (positionData.getType() == DeviceType.MARK_TYPE) {
             //CompoundMark mark = courseData.getCompoundMarks().get(positionData.getDeviceId());
         }