Issue #2052751 by tim.plunkett, oriol_e9g, yched | alexpott: Fixed WidgetFactory is not used anywhere so it should be removed.

core/lib/Drupal/Core/Field/WidgetFactory.php

@@ -1,25 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Field\WidgetFactory.
- */
-
-namespace Drupal\Core\Field;
-
-use Drupal\Component\Plugin\Factory\DefaultFactory;
-
-/**
- * Factory class for the Widget plugin type.
- */
-class WidgetFactory extends DefaultFactory {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function createInstance($plugin_id, array $configuration = array()) {
-    $plugin_definition = $this->discovery->getDefinition($plugin_id);
-    $plugin_class = static::getPluginClass($plugin_id, $plugin_definition, $this->interface);
-    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings']);
-  }
-}

core/lib/Drupal/Core/Field/WidgetPluginManager.php

@@ -51,8 +51,6 @@ class WidgetPluginManager extends DefaultPluginManager {
 
     $this->setCacheBackend($cache_backend, 'field_widget_types_plugins');
     $this->alterInfo('field_widget_info');
-
-    $this->factory = new WidgetFactory($this);
     $this->fieldTypeManager = $field_type_manager;
   }