class RemoveBlockForm

class RemoveBlockForm extends LayoutRebuildConfirmFormBase {

  /**
   * The current region.
   *
   * @var string
   */
  protected $region;

  /**
   * The UUID of the block being removed.
   *
   * @var string
   */
  protected $uuid;

  /**
   * {@inheritdoc}
   */
  public function getQuestion() {
    $label = $this->sectionStorage
      ->getSection($this->delta)
      ->getComponent($this->uuid)
      ->getPlugin()
      ->label();
    return $this
      ->t('Are you sure you want to remove the %label block?', [
      '%label' => $label,
    ]);
  }

  /**
   * {@inheritdoc}
   */
  public function getConfirmText() {
    return $this
      ->t('Remove');
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'layout_builder_remove_block';
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, SectionStorageInterface $section_storage = NULL, $delta = NULL, $region = NULL, $uuid = NULL) {
    $this->region = $region;
    $this->uuid = $uuid;
    return parent::buildForm($form, $form_state, $section_storage, $delta);
  }

  /**
   * {@inheritdoc}
   */
  protected function handleSectionStorage(SectionStorageInterface $section_storage, FormStateInterface $form_state) {
    $section_storage
      ->getSection($this->delta)
      ->removeComponent($this->uuid);
  }

}