// Default stale file threshold is 30 days.
if (REQUEST_TIME - filemtime($uri) > \Drupal::config('system.performance')->get('stale_file_threshold')) {
file_unmanaged_delete($uri);
// Default stale file threshold is 30 days.
if (REQUEST_TIME - filemtime($uri) > \Drupal::config('system.performance')->get('stale_file_threshold')) {
file_unmanaged_delete($uri);