Issue #3261574: Add .engine to files scanned by PHPCS

core/modules/system/tests/themes/engines/nyan_cat/nyan_cat.engine

@@ -6,7 +6,6 @@
  */
 
 use Drupal\Component\Utility\Html;
-use Drupal\Core\Extension\Extension;
 
 /**
  * Implements hook_theme().
@@ -24,14 +23,6 @@ function nyan_cat_extension() {
 
 /**
  * Implements hook_render_template().
- *
- * @param string $template_file
- *   The filename of the template to render.
- * @param mixed[] $variables
- *   A keyed array of variables that will appear in the output.
- *
- * @return string
- *   The output generated by the template.
  */
 function nyan_cat_render_template($template_file, $variables) {
   $output = str_replace('div', 'nyancat', file_get_contents(\Drupal::root() . '/' . $template_file));