Test on big endian CPU architectures

src/md5.c

@@ -2,15 +2,6 @@
 #include "arch.h"
 
 #if defined(MG_ENABLE_MD5) && MG_ENABLE_MD5
-#if !defined(BYTE_ORDER) && defined(__BYTE_ORDER)
-#define BYTE_ORDER __BYTE_ORDER
-#ifndef LITTLE_ENDIAN
-#define LITTLE_ENDIAN __LITTLE_ENDIAN
-#endif /* LITTLE_ENDIAN */
-#ifndef BIG_ENDIAN
-#define BIG_ENDIAN __LITTLE_ENDIAN
-#endif /* BIG_ENDIAN */
-#endif /* BYTE_ORDER */
 
 static void mg_byte_reverse(unsigned char *buf, unsigned longs) {
 /* Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN */