remove extraneous include

should have happened as part of a1d59f8

Author: yakra

siteupdate/cplusplus/classes/GraphGeneration/HighwayGraph.cpp

@@ -4,7 +4,6 @@
 #include "HGVertex.h"
 #include "PlaceRadius.h"
 #include "../Args/Args.h"
-#include "../Datacheck/Datacheck.h"
 #include "../ElapsedTime/ElapsedTime.h"
 #include "../HighwaySegment/HighwaySegment.h"
 #include "../HighwaySystem/HighwaySystem.h"