Removed now unneeded date library

Joel Grunbaum

2022-01-13 90107c504e5b7d1bea2c93a43c7d07b640350355

 json.cpp

@@ -1,6 +1,5 @@
#include "json.hpp"
#include "book.hpp"
#include "date/include/date/date.h"
#include "protocol.hpp"
#include "rapidjson/include/rapidjson/document.h"
#include "rapidjson/include/rapidjson/rapidjson.h"