Removed now unneeded date library

Joel Grunbaum

2022-01-13 90107c504e5b7d1bea2c93a43c7d07b640350355

 json.hpp

@@ -29,7 +29,7 @@
   NONE
};

enum TradeTypeEnum { BUY_AGGRESSOR, SELL_AGGRESSOR };
enum TradeTypeEnum { BUY_AGGRESSOR, SELL_AGGRESSOR, BROKER_TRADE };

struct Message {
   MessageTypes type;