fix: remove MAX_HEADER_LEN, which is already declared at http-common.h
#define MAX_LOCALE_LEN 16 + 1
#define MAX_EMAIL_LEN 254 + 1
#define MAX_REGION_LEN 16 + 1
-#define MAX_HEADER_LEN 512 + 1
#define MAX_REASON_LEN 512 + 1
#define MAX_MESSAGE_LEN 2000 + 1
#define MAX_PAYLOAD_LEN 4096 + 1
