[openssl/openssl] 63cecc: Remove a redundant point mul from ossl_ec_key_publ...

[Matt Caswell]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: 63cecc23e1b9b60c2dd030e887fee810f29ac197
      https://github.com/openssl/openssl/commit/63cecc23e1b9b60c2dd030e887fee810f29ac197
  Author: Matt Caswell <matt at openssl.org>
  Date:   2023-09-01 (Fri, 01 Sep 2023)

  Changed paths:
    M crypto/ec/ec_key.c

  Log Message:
  -----------
  Remove a redundant point mul from ossl_ec_key_public_check()

This code was added in error and is entirely redundant. It is also an
expensive operation (e.g. see #21833).

Fixes #21834

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Shane Lontis <shane.lontis at oracle.com>
Reviewed-by: Hugo Landau <hlandau at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21902)

(cherry picked from commit 3961991593f788b3efb2a27563d358c7c58f854c)