remove remnants of hinting mechanism

Include/osrm/RouteParameters.h

@@ -40,7 +40,7 @@ struct RouteParameters
     RouteParameters();
 
     void setZoomLevel(const short level);
-    
+
     void setNumberOfResults(const short number);
 
     void setAlternateRouteFlag(const bool flag);
@@ -78,13 +78,11 @@ struct RouteParameters
     bool compression;
     bool deprecatedAPI;
     bool uturn_default;
-    unsigned check_sum;
     short num_results;
     std::string service;
     std::string output_format;
     std::string jsonp_parameter;
     std::string language;
-    std::vector<std::string> hints;
     std::vector<bool> uturns;
     std::vector<FixedPointCoordinate> coordinates;
 };