Issue #3445134 by roderik: Remove custom_elements_everywhere submodule.

README.md

@@ -141,6 +141,20 @@ displays are applied, when an entity is being rendered:
 
 ## Upgrade from 2.x
 
+### Preparation
+
+Make sure some submodules are not enabled, or deal with uninstalling the
+nonexistent modules later: (They have been removed as of the first 3.x release
+because of their very small install base.)
+
+* custom_elements_everywhere:
+  There is no 100% replacement; all entities/bundles can have Custom Elements
+  enabled in the corresponding "Manage display" tab in the UI. (In terms of
+  configuration: in each applicable
+  core.entity_view_display.TYPE.BUNDLE.VIEWMODE configuration entity, set
+  third_party_settings.custom_elements.enabled = true.)
+
+
 TODO: By default custom-element display config is generated for all entity
 bundles, thus rendering is changed to follow this config. If that's not desired,
 regular displays can be still used by simply deleting this config entries for

modules/custom_elements_everywhere/README.md

-# Custom elements everywhere
-
-Enable custom elements on all entity view modes.
-
-# Usage
-
-Simply enable the module.

modules/custom_elements_everywhere/custom_elements_everywhere.info.yml

-name: Custom Elements Everywhere
-description: Render fields as custom elements on all view modes.
-package: Other
-type: module
-core_version_requirement: ^8.8 || ^9 || ^10
-dependencies:
-  - custom_elements:custom_elements

modules/custom_elements_everywhere/custom_elements_everywhere.module

-<?php
-
-/**
- * @file
- * Custom elements hooks.
- */
-
-/**
- * Implements hook_entity_prepare_view().
- */
-function custom_elements_everywhere_entity_prepare_view($entity_type_id, array $entities, array $displays, $view_mode) {
-  if (!\Drupal::service('router.admin_context')->isAdminRoute()) {
-    // Use this hook for enabling custom elements rendering since it applies
-    // to all proper entity rendering, but not to single-field rendered
-    // displays. Single field rendered displayed should be rendered as usual,
-    // such that custom elements processor may use it to render
-    // individual fields.
-    foreach ($displays as $display) {
-      $display->setThirdPartySetting('custom_elements', 'enabled', TRUE);
-    }
-  }
-}