Revert "tls13: add ecdh_read_public"

This reverts commit 6a9d2ee4df88028e352e50d4f48687ce5b0f26ac.

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/ecdh.c b/library/ecdh.c
index b1d7c2a..b72bd1f 100644
--- a/library/ecdh.c
+++ b/library/ecdh.c
@@ -31,7 +31,6 @@
 #include "mbedtls/ecdh.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"
-#include "ssl_misc.h"
 
 #include "ecdh_misc.h"
 
@@ -691,55 +690,6 @@
     return mbedtls_mpi_write_binary( &ctx->z, buf, *olen );
 }
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
-
-static int ecdh_read_tls13_public_internal( mbedtls_ecdh_context_mbed *ctx,
-                                            const unsigned char *buf,
-                                            size_t blen )
-{
-    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    const unsigned char *p = buf;
-
-    if( ( ret = mbedtls_ecp_tls13_read_point( &ctx->grp, &ctx->Qp, &p,
-                                              blen ) ) != 0 )
-        return( ret );
-
-    if( (size_t)( p - buf ) != blen )
-        return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
-
-    return( 0 );
-}
-
-/*
- * Parse and import the client's TLS 1.3 public value
- */
-int mbedtls_ecdh_tls13_read_public( mbedtls_ecdh_context *ctx,
-                                    const unsigned char *buf, size_t blen )
-{
-    ECDH_VALIDATE_RET( ctx != NULL );
-    ECDH_VALIDATE_RET( buf != NULL );
-
-#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
-    return( ecdh_read_tls13_public_internal( ctx, buf, blen ) );
-#else
-    switch( ctx->var )
-    {
-#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
-        case MBEDTLS_ECDH_VARIANT_EVEREST:
-            return( mbedtls_everest_read_public( &ctx->ctx.everest_ecdh,
-                                                 buf, blen ) );
-#endif
-        case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0:
-            return( ecdh_read_tls13_public_internal( &ctx->ctx.mbed_ecdh,
-                                                     buf, blen ) );
-        default:
-            return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
-    }
-#endif
-}
-
-#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
-
 /*
  * Derive and export the shared secret
  */
diff --git a/library/ecp.c b/library/ecp.c
index a49cc45..0212069 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -79,7 +79,6 @@
 
 #include "bn_mul.h"
 #include "ecp_invasive.h"
-#include "ssl_misc.h"
 
 #include <string.h>
 
@@ -1052,39 +1051,6 @@
     return( ret );
 }
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
-
-int mbedtls_ecp_tls13_read_point( const mbedtls_ecp_group *grp,
-                                  mbedtls_ecp_point *pt,
-                                  const unsigned char **buf, size_t buf_len )
-{
-    unsigned char data_len;
-    const unsigned char *buf_start;
-    ECP_VALIDATE_RET( grp != NULL );
-    ECP_VALIDATE_RET( pt  != NULL );
-    ECP_VALIDATE_RET( buf != NULL );
-    ECP_VALIDATE_RET( *buf != NULL );
-
-    if( buf_len < 3 )
-        return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
-
-    data_len = ( *( *buf ) << 8 ) | *( *buf+1 );
-    *buf += 2;
-
-    if( data_len < 1 || data_len > buf_len - 2 )
-        return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
-
-    /*
-     * Save buffer start for read_binary and update buf
-     */
-    buf_start = *buf;
-    *buf += data_len;
-
-    return( mbedtls_ecp_point_read_binary( grp, pt, buf_start, data_len ) );
-}
-
-#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
-
 /*
  * Fast mod-p functions expect their argument to be in the 0..p^2 range.
  *
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 44bfcb0..8c5a32d 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -1539,24 +1539,6 @@
                                                unsigned char const *msg,
                                                size_t msg_len );
 
-#if defined(MBEDTLS_ECDH_C)
-/*
- * TLS 1.3 version of mbedtls_ecdh_read_public in ecdh.h
- */
-int mbedtls_ecdh_tls13_read_public( mbedtls_ecdh_context *ctx,
-                                    const unsigned char *buf,
-                                    size_t blen );
-#endif /* MBEDTLS_ECDH_C */
-
-#if defined(MBEDTLS_ECP_C)
-/*
- * TLS 1.3 version of mbedtls_ecp_tls_read_point in ecp.h
- */
-int mbedtls_ecp_tls13_read_point( const mbedtls_ecp_group *grp,
-                                  mbedtls_ecp_point *pt,
-                                  const unsigned char **buf, size_t len );
-#endif /* MBEDTLS_ECP_C */
-
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
 /*
  * Write TLS 1.3 Signature Algorithm extension