Removed unused classes and imports

- Removed references to Constants class from other classes and tests
- ArrowController, Constants, Regatta removed
- Removed imports from various classes no longer used

#story[1003]

mock/src/main/java/seng302/DataInput/XMLReader.java

@@ -13,7 +13,6 @@ import javax.xml.transform.*;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.StringReader;
 import java.io.StringWriter;
 

mock/src/main/java/seng302/Model/GPSCoordinate.java

@@ -2,12 +2,10 @@ package seng302.Model;
 
 import javafx.util.Pair;
 import org.geotools.referencing.GeodeticCalculator;
-import org.opengis.geometry.DirectPosition;
 import seng302.Constants;
 
 import java.awt.geom.Point2D;
 import java.util.ArrayList;
-import java.util.Comparator;
 import java.util.List;
 
 /**

mock/src/main/java/seng302/Model/Race.java

@@ -6,7 +6,6 @@ import javafx.collections.ObservableList;
 import seng302.Constants;
 import seng302.DataInput.RaceDataSource;
 import seng302.MockOutput;
-import seng302.Networking.Messages.BoatLocation;
 import seng302.Networking.Messages.BoatStatus;
 import seng302.Networking.Messages.Enums.BoatStatusEnum;
 import seng302.Networking.Messages.Enums.RaceStatusEnum;

mock/src/test/java/seng302/DataInput/PolarParserTest.java

@@ -5,8 +5,6 @@ import org.testng.annotations.Test;
 import seng302.Exceptions.InvalidPolarFileException;
 import seng302.Model.Polars;
 
-import java.io.File;
-
 import static org.testng.Assert.*;
 
 /**

mock/src/test/java/seng302/Model/RaceTest.java

@@ -20,7 +20,6 @@ import java.util.ArrayList;
 
 
 import static org.junit.Assert.*;
-import static org.mockito.Matchers.*;
 import static org.mockito.Mockito.*;
 
 /**