Enable PIT ISR to count milliseconds

src/hulk/rtc.d

@@ -79,11 +79,9 @@ struct Rtc
     public static void isr()
     {
         static __gshared ulong count;
-        static __gshared ulong seconds;
         count++;
         if ((count % 1024) == 0u)
         {
-            seconds++;
             Console.update_header();
         }
         eoi();