crypto: remove redundant access() checks before loading certs

The qcrypto_tls_creds_get_path method will perform an access()
check on the file and return a NULL path if it fails. By the
time we get to loading the cert files we know they must exist
on disk and thus the second access() check is redundant.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

crypto/tlscredsx509.c

@@ -496,8 +496,7 @@ qcrypto_tls_creds_x509_sanity_check(QCryptoTLSCredsX509 *creds,
     size_t i;
     int ret = -1;
 
-    if (certFile &&
-        access(certFile, R_OK) == 0) {
+    if (certFile) {
         if (qcrypto_tls_creds_load_cert_list(creds,
                                              certFile,
                                              &certs,
@@ -508,16 +507,15 @@ qcrypto_tls_creds_x509_sanity_check(QCryptoTLSCredsX509 *creds,
             goto cleanup;
         }
     }
-    if (access(cacertFile, R_OK) == 0) {
-        if (qcrypto_tls_creds_load_cert_list(creds,
-                                             cacertFile,
-                                             &cacerts,
-                                             &ncacerts,
-                                             isServer,
-                                             true,
-                                             errp) < 0) {
-            goto cleanup;
-        }
+
+    if (qcrypto_tls_creds_load_cert_list(creds,
+                                         cacertFile,
+                                         &cacerts,
+                                         &ncacerts,
+                                         isServer,
+                                         true,
+                                         errp) < 0) {
+        goto cleanup;
     }
 
     for (i = 0; i < ncerts; i++) {