Remove misleading diagnostics on pinned sender cert in OSSL_CMP_validate_msg()
Remove misleading diagnostics on pinned sender cert in OSSL_CMP_validate_msg()

Reviewed-by: Matt Caswell <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11998)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl