docs: #3624887 Remove obsolete hook_extension() and hook_render_template() documentation

  }

}

/**

 * Declare a template file extension to be used with a theme engine.

 *

 * This hook is used in a theme engine implementation in the format of

 * ENGINE_extension().

 *

 * @return string

 *   The file extension the theme engine will recognize.

 */

function hook_extension(): string {

  // Extension for template base names in Twig.

  return '.html.twig';

}

/**

 * Render a template using the theme engine.

 *

 * It is the theme engine's responsibility to escape variables. The only

 * exception is if a variable implements

 * \Drupal\Component\Render\MarkupInterface. Drupal is inherently unsafe if

 * other variables are not escaped.

 *

 * @param string $template_file

 *   The path (relative to the Drupal root directory) to the template to be

 *   rendered including its extension in the format 'path/to/TEMPLATE_NAME.EXT'.

 * @param array $variables

 *   A keyed array of variables that are available for composing the output. The

 *   theme engine is responsible for passing all the variables to the template.

 *   Depending on the code in the template, all or just a subset of the

 *   variables might be used in the template.

 *

 * @return string

 *   The output generated from the template. In most cases this will be a string

 *   containing HTML markup.

 */

function hook_render_template($template_file, $variables): string|\Stringable {

  $twig_service = \Drupal::service('twig');

  return $twig_service->loadTemplate($template_file)->render($variables);

}

/**

 * Alter the element type information returned from modules.

 *