diff --git a/uuid.core.inc b/uuid.core.inc
index e54b556..e3c2897 100644
--- a/uuid.core.inc
+++ b/uuid.core.inc
@@ -269,34 +269,7 @@ function image_field_uuid_presave($entity_type, $entity, $field, $instance, $lan
 
 /**
  * Implements hook_field_uuid_load().
- */
-function node_reference_field_uuid_load($entity_type, $entity, $field, $instance, $langcode, &$items) {
-  entity_property_id_to_uuid($items, 'node', 'nid');
-}
-
-/**
- * Implements hook_field_uuid_presave().
- */
-function node_reference_field_uuid_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
-  entity_property_uuid_to_id($items, 'node', 'nid');
-}
-
-/**
- * Implements hook_field_uuid_load().
- */
-function user_reference_field_uuid_load($entity_type, $entity, $field, $instance, $langcode, &$items) {
-  entity_property_id_to_uuid($items, 'user', 'uid');
-}
-
-/**
- * Implements hook_field_uuid_presave().
- */
-function user_reference_field_uuid_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
-  entity_property_uuid_to_id($items, 'user', 'uid');
-}
-
-/**
- * Implements hook_field_uuid_load().
+ * Kept here because it is in D8 core.
  */
 function entityreference_field_uuid_load($entity_type, $entity, $field, $instance, $langcode, &$items) {
   // TODO: This is not really good, but as of now 'entity_property_id_to_uuid()'
@@ -306,6 +279,7 @@ function entityreference_field_uuid_load($entity_type, $entity, $field, $instanc
 
 /**
  * Implements hook_field_uuid_presave().
+ * Kept here because it is in D8 core.
  */
 function entityreference_field_uuid_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
   // TODO: This is not really good, but as of now 'entity_property_id_to_uuid()'
@@ -314,38 +288,6 @@ function entityreference_field_uuid_presave($entity_type, $entity, $field, $inst
 }
 
 /**
- * Implements hook_entity_uuid_load().
- */
-function field_collection_entity_uuid_load(&$entities, $entity_type) {
-  if ($entity_type == 'field_collection_item') {
-    entity_property_id_to_uuid($entities, 'field_collection_item', 'value');
-  }
-}
-
-/**
- * Implements hook_entity_uuid_presave().
- */
-function field_collection_entity_uuid_presave(&$entity, $entity_type) {
-  if ($entity_type == 'field_collection_item') {
-    entity_property_uuid_to_id($entity, 'field_collection_item', 'value');
-  }
-}
-
-/**
- * Implements hook_field_uuid_load().
- */
-function field_collection_field_uuid_load($entity_type, $entity, $field, $instance, $langcode, &$items) {
-  entity_property_id_to_uuid($items, 'field_collection_item', 'value');
-}
-
-/**
- * Implements hook_field_uuid_presave().
- */
-function field_collection_field_uuid_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
-  entity_property_uuid_to_id($items, 'field_collection_item', 'value');
-}
-
-/**
  * @} End of "Field implementations"
  */
 
@@ -392,16 +334,5 @@ function file_uuid_entities_features_export_field_alter($entity_type, $entity, $
 }
 
 /**
- * Implements hook_uuid_entities_features_export_entity_alter().
- */
-function workbench_uuid_entities_features_export_entity_alter(&$entity, $entity_type) {
-  foreach (array('workbench_moderation', 'my_revision', 'workbench_access', 'workbench_access_scheme', 'workbench_access_by_role') as $property) {
-    if (isset($entity->{$property})) {
-      unset($entity->{$property});
-    }
-  }
-}
-
-/**
  * @} End of "Export alterations"
  */