Issue #1618164 by aspilicious, fago: Remove the possibility to define custom 'load hooks'.

core/modules/entity/entity.api.php

@@ -36,9 +36,6 @@
  *     to disable Field API's persistent cache of field data. Only recommended
  *     if a higher level persistent cache is available for the entity type.
  *     Defaults to TRUE.
- *   - load hook: The name of the hook which should be invoked by
- *     Drupal\entity\DatabaseStorageController::attachLoad(), for example
- *     'node_load'.
  *   - uri callback: A function taking an entity as argument and returning the
  *     uri elements of the entity, e.g. 'path' and 'options'. The actual entity
  *     uri can be constructed by passing these elements to url().

core/modules/entity/entity.module

@@ -73,7 +73,6 @@ function entity_get_info($entity_type = NULL) {
           'controller class' => 'Drupal\entity\DatabaseStorageController',
           'static cache' => TRUE,
           'field cache' => TRUE,
-          'load hook' => $name . '_load',
           'bundles' => array(),
           'view modes' => array(),
           'entity keys' => array(),

core/modules/entity/lib/Drupal/entity/DatabaseStorageController.php

@@ -304,8 +304,8 @@ protected function attachLoad(&$queried_entities, $revision_id = FALSE) {
     // always the queried entities, followed by additional arguments set in
     // $this->hookLoadArguments.
     $args = array_merge(array($queried_entities), $this->hookLoadArguments);
-    foreach (module_implements($this->entityInfo['load hook']) as $module) {
-      call_user_func_array($module . '_' . $this->entityInfo['load hook'], $args);
+    foreach (module_implements($this->entityType . '_load') as $module) {
+      call_user_func_array($module . '_' . $this->entityType . '_load', $args);
     }
   }