Revert "Add comment on map data encodng"

This reverts commit 73c83bf35d.

src/main/java/GraphWithMapData.java

@@ -6,7 +6,6 @@ import java.util.Map;
 //Can't just write the graph, because I need the occupancy data too.
 //Makes most sense to serialize object and write that to a file.
 //Which means there's no reason to split map data and graph data up.
-//Custom vertex class means a lot of the map data can now be encoded in the graph itself
 public class GraphWithMapData implements java.io.Serializable {
 
     private String sourceFilename;