ssl-opt.sh: Remove one pattern check

In "Authentication: client cert not trusted,
server required" ssl-opt.sh test, depending
on client and server execution speed, the
handshake on the client side may complete
successfully: the TLS connection is aborted
by the server because it is not able to
authenticate the client but at that time
the client may have completed the handshake
on its side. Thus, do not check that the
client handshake failed.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>

tests/ssl-opt.sh

@@ -4914,7 +4914,6 @@ run_test    "Authentication: client cert not trusted, server required" \
             -s "x509_verify_cert() returned" \
             -s "! The certificate is not correctly signed by the trusted CA" \
             -s "! mbedtls_ssl_handshake returned" \
-            -c "! mbedtls_ssl_handshake returned" \
             -s "X509 - Certificate verification failed"
 
 run_test    "Authentication: client badcert, server optional" \