A Drupal 8 update hook to uninstall workbench moderation

my_module.install.php

<?php

/**
 * Uninstall workbench_moderation module and its fields, update content overview page.
 */
function my_module_update_8001() {
  if (\Drupal::service('module_handler')->moduleExists('workbench_moderation')) {
    // Delete moderation_state fields.
    // @see \Drupal\workbench_moderation\Form\PrepareUninstallForm::submitForm().
    // @see https://www.drupal.org/node/2627012
    $tables_to_update = [];
    $moderation_info = \Drupal::service('workbench_moderation.moderation_information');
    $entity_type_manager = \Drupal::service('entity_type.manager');
    foreach ($entity_type_manager->getDefinitions() as $entity_type) {
      if ($moderation_info->isModeratableEntityType($entity_type)) {
        $tables_to_update[] = $entity_type->getDataTable();
        $tables_to_update[] = $entity_type->getRevisionDataTable();
      }
    }
    $db_connection = \Drupal::database();
    foreach ($tables_to_update as $table) {
      if ($table && $db_connection->schema()->fieldExists($table, 'moderation_state')) {
        $db_connection->update($table)
          ->fields(['moderation_state' => NULL])
          ->execute();
      }
    }

    \Drupal::service('module_installer')->uninstall(['workbench_moderation']);

    // Remove the field storage and instance configuration.
    $bundles = ['content_type_1', 'content_type_2'];
    foreach ($bundles as $bundle) {
      if (FieldConfig::loadByName('node', $bundle, 'field_moderation_state_update')) {
        FieldConfig::loadByName('node', $bundle, 'field_moderation_state_update')->delete();
      }
    }
    // After all field instances have been deleted, delete the field storage.
    if (FieldStorageConfig::loadByName('node', 'field_moderation_state_update')) {
      FieldStorageConfig::loadByName('node', 'field_moderation_state_update')->delete();
    }

    // Update content overview page with Drupal core node view.
    $module_handler = \Drupal::moduleHandler();
    $config_storage = new FileStorage($module_handler->getModule('node')->getPath() . '/config/optional');
    $config_name = 'views.view.content';
    $config_record = $config_storage->read($config_name);
    $entity_type = \Drupal::service('config.manager')->getEntityTypeIdByName($config_name);
    /** @var \Drupal\Core\Config\Entity\ConfigEntityStorageInterface $storage */
    $storage = \Drupal::entityTypeManager()->getStorage($entity_type);
    $entity = $storage->createFromStorageRecord($config_record);
    $entity->save();
  }
}