cleaned up imports and using directives

headers/Customer.h

@@ -3,7 +3,6 @@
 #pragma once
 
 #include "Park_time.h"
-#include "data.h"
 
 #include <vector>
 

headers/Interface.h

@@ -1,6 +1,5 @@
 #include "Query.h"
-#include <stdlib.h>
-#include <synchapi.h>
+
 
 using std::cin;
 

headers/Park_time.h

@@ -8,13 +8,10 @@
 #include <ctime>
 #include <thread>
 
-
 using namespace std::chrono;
 using std::cout;
 using std::flush;
-using std::string;
 using std::to_string;
-using std::chrono::milliseconds;
 using std::this_thread::sleep_for;
 /*