Removed an unnecessary #define

Author: GabrielNotman

src/RTCZero.cpp

@@ -19,8 +19,7 @@
 
 #include "RTCZero.h"
 
-#define EPOCH_TIME_OFF 946684800  // This is 2000-jan-01 00:00:00 in epoch time
-#define SECONDS_PER_DAY 86400L
+#define EPOCH_TIME_OFF 946684800  // This is 1st January 2000, 00:00:00 in epoch time
 
 static const uint8_t daysInMonth[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 };