mbedtls: remove mbedtls_x509_crt_info reference

Nobody uses this from the wrapper... it brings in mbedtls_x509_crt_info()
even if you're using -ffunctionsections for a loss of about 1.7KB on Arm.


Let's chop it out...

lib/tls/mbedtls/wrapper/platform/ssl_pm.c

@@ -551,6 +551,7 @@ OSSL_HANDSHAKE_STATE ssl_pm_get_state(const SSL *ssl)
 
 int x509_pm_show_info(X509 *x)
 {
+#if 0
     int ret;
     char *buf;
     mbedtls_x509_crt *x509_crt;
@@ -590,6 +591,9 @@ int x509_pm_show_info(X509 *x)
     ssl_mem_free(buf);
 no_mem:
     return -1;
+#else
+    return 0;
+#endif
 }
 
 int x509_pm_new(X509 *x, X509 *m_x)