perf: #3564917 Get rid of gc_collect_cycles() call in attributes discovery

    }

    spl_autoload_unregister([$autoloader, 'loadClass']);

    // Plugin discovery is a memory expensive process due to reflection and the

    // number of files involved. Collect cycles at the end of discovery to be as

    // efficient as possible.

    gc_collect_cycles();

    return $definitions;

  }