Issue #2407397 by JeroenT, mrjmd: remove drupal_html_id()

core/includes/common.inc

@@ -602,40 +602,6 @@ function drupal_clear_css_cache() {
   \Drupal::service('asset.css.collection_optimizer')->deleteAll();
 }
 
-/**
- * Prepares a string for use as a valid HTML ID and guarantees uniqueness.
- *
- * This function ensures that each passed HTML ID value only exists once on the
- * page. By tracking the already returned ids, this function enables forms,
- * blocks, and other content to be output multiple times on the same page,
- * without breaking (X)HTML validation.
- *
- * For already existing IDs, a counter is appended to the ID string. Therefore,
- * JavaScript and CSS code should not rely on any value that was generated by
- * this function and instead should rely on manually added CSS classes or
- * similarly reliable constructs.
- *
- * Two consecutive hyphens separate the counter from the original ID. To manage
- * uniqueness across multiple Ajax requests on the same page, Ajax requests
- * POST an array of all IDs currently present on the page, which are used to
- * prime this function's cache upon first invocation.
- *
- * To allow reverse-parsing of IDs submitted via Ajax, any multiple consecutive
- * hyphens in the originally passed $id are replaced with a single hyphen.
- *
- * @param $id
- *   The ID to clean.
- *
- * @return
- *   The cleaned ID.
- *
- * @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.0.
- *   Use \Drupal\Component\Utility\Html::getUniqueId()
- */
-function drupal_html_id($id) {
-  return Html::getUniqueId($id);
-}
-
 /**
  * Constructs an array of the defaults that are used for JavaScript assets.
  *