openvz: Remove unnecessary Unref in openvzLoadDomains

Since there is no way to get to cleanup without dom being NULL,
this is a unnecessary Unref.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/openvz/openvz_conf.c

@@ -626,7 +626,6 @@ int openvzLoadDomains(struct openvz_driver *driver)
     virCommandFree(cmd);
     VIR_FREE(temp);
     VIR_FREE(outbuf);
-    virObjectUnref(dom);
     virDomainDefFree(def);
     return -1;
 }