Generate StreamedCourse from VisualiserInput

- Allow Race to get boat location messages (added last commit)
- Removed faulty import statement (this commit)

#story[782]

visualiser/src/main/java/seng302/Mock/BoatXMLReader.java

@@ -1,7 +1,6 @@
 package seng302.Mock;
 
 import javafx.scene.paint.Color;
-import jdk.internal.util.xml.impl.Input;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;