Remove unused parameters from internal functions

Reviewed-by: Richard Levitte <levitte@openssl.org>

ssl/d1_lib.c

@@ -890,8 +890,7 @@ end:
 
 static int dtls1_set_handshake_header(SSL *s, int htype, unsigned long len)
 {
-    unsigned char *p = (unsigned char *)s->init_buf->data;
-    dtls1_set_message_header(s, p, htype, len, 0, len);
+    dtls1_set_message_header(s, htype, len, 0, len);
     s->init_num = (int)len + DTLS1_HM_HEADER_LENGTH;
     s->init_off = 0;
     /* Buffer the message to handle re-xmits */