Remove useless comments about handshake messages for TLS13

Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index d6e214b..517a063 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -533,8 +533,8 @@
 #define MBEDTLS_SSL_HS_SERVER_HELLO             2
 #define MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST     3
 #define MBEDTLS_SSL_HS_NEW_SESSION_TICKET       4
-#define MBEDTLS_SSL_HS_END_OF_EARLY_DATA        5 // NEW IN TLS 1.3
-#define MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS     8 // NEW IN TLS 1.3
+#define MBEDTLS_SSL_HS_END_OF_EARLY_DATA        5
+#define MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS     8
 #define MBEDTLS_SSL_HS_CERTIFICATE             11
 #define MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE     12
 #define MBEDTLS_SSL_HS_CERTIFICATE_REQUEST     13