Remove historic ECN definitions from IPv6
/* in network endian */
#define IPV6_FLOWINFO_MASK ((uint32_t)htonl(0x0fffffff)) /* flow info (28 bits) */
#define IPV6_FLOWLABEL_MASK ((uint32_t)htonl(0x000fffff)) /* flow label (20 bits) */
-#if 1
-/* ECN bits proposed by Sally Floyd */
-#define IP6TOS_CE 0x01 /* congestion experienced */
-#define IP6TOS_ECT 0x02 /* ECN-capable transport */
-#endif
/*
* Extension Headers