Remove some dead code from libssl

There are a small number of functions in libssl that are internal only
and never used by anything.
Reviewed-by: NEmilia Käsper <emilia@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2770)

ssl/record/rec_layer_d1.c

@@ -109,11 +109,6 @@ void DTLS_RECORD_LAYER_set_saved_w_epoch(RECORD_LAYER *rl, unsigned short e)
     rl->d->w_epoch = e;
 }
 
-void DTLS_RECORD_LAYER_resync_write(RECORD_LAYER *rl)
-{
-    memcpy(rl->write_sequence, rl->read_sequence, sizeof(rl->write_sequence));
-}
-
 void DTLS_RECORD_LAYER_set_write_sequence(RECORD_LAYER *rl, unsigned char *seq)
 {
     memcpy(rl->write_sequence, seq, SEQ_NUM_SIZE);

ssl/record/rec_layer_s3.c

@@ -88,23 +88,6 @@ int RECORD_LAYER_write_pending(const RECORD_LAYER *rl)
         && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0;
 }
 
-int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf,
-                          size_t len)
-{
-    rl->packet_length = len;
-    if (len != 0) {
-        rl->rstate = SSL_ST_READ_HEADER;
-        if (!SSL3_BUFFER_is_initialised(&rl->rbuf))
-            if (!ssl3_setup_read_buffer(rl->s))
-                return 0;
-    }
-
-    rl->packet = SSL3_BUFFER_get_buf(&rl->rbuf);
-    SSL3_BUFFER_set_data(&rl->rbuf, buf, len);
-
-    return 1;
-}
-
 void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl)
 {
     memset(rl->read_sequence, 0, sizeof(rl->read_sequence));

ssl/record/record.h

@@ -208,8 +208,6 @@ void RECORD_LAYER_clear(RECORD_LAYER *rl);
 void RECORD_LAYER_release(RECORD_LAYER *rl);
 int RECORD_LAYER_read_pending(const RECORD_LAYER *rl);
 int RECORD_LAYER_write_pending(const RECORD_LAYER *rl);
-int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf,
-                          size_t len);
 void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl);
 void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl);
 int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl);
@@ -236,7 +234,6 @@ void DTLS_RECORD_LAYER_free(RECORD_LAYER *rl);
 void DTLS_RECORD_LAYER_clear(RECORD_LAYER *rl);
 void DTLS_RECORD_LAYER_set_saved_w_epoch(RECORD_LAYER *rl, unsigned short e);
 void DTLS_RECORD_LAYER_clear(RECORD_LAYER *rl);
-void DTLS_RECORD_LAYER_resync_write(RECORD_LAYER *rl);
 void DTLS_RECORD_LAYER_set_write_sequence(RECORD_LAYER *rl, unsigned char *seq);
 __owur int dtls1_read_bytes(SSL *s, int type, int *recvd_type,
                             unsigned char *buf, size_t len, int peek,

ssl/ssl_lib.c

@@ -3612,11 +3612,6 @@ void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
     return (CRYPTO_get_ex_data(&s->ex_data, idx));
 }
 
-int ssl_ok(SSL *s)
-{
-    return (1);
-}
-
 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
 {
     return (ctx->cert_store);

ssl/ssl_locl.h

@@ -2210,7 +2210,6 @@ __owur int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
 __owur int tls1_alert_code(int code);
 __owur int tls13_alert_code(int code);
 __owur int ssl3_alert_code(int code);
-__owur int ssl_ok(SSL *s);
 
 #  ifndef OPENSSL_NO_EC
 __owur int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s);