Issue #3272489: Remove deprecated abstract class FillPdfAdminFormBase

src/Form/FillPdfAdminFormBase.php

-<?php
-
-namespace Drupal\fillpdf\Form;
-
-use Drupal\Core\Form\FormBase;
-
-@trigger_error('FillPdfAdminFormBase is deprecated in fillpdf:8.x-4.7 and is removed from fillpdf:8.x-5.0. Use \Drupal\Core\Form\FormBase instead. See https://www.drupal.org/project/fillpdf/issues/3044743', E_USER_DEPRECATED);
-
-/**
- * Base class for administrative forms.
- *
- * @package Drupal\fillpdf\Form
- *
- * @deprecated in fillpdf:8.x-4.7 and is removed from fillpdf:8.x-5.0. Use
- *   FormBase instead.
- * @see https://www.drupal.org/project/fillpdf/issues/3044743
- * @see \Drupal\Core\Form\FormBase
- */
-abstract class FillPdfAdminFormBase extends FormBase {
-
-  /**
-   * FillPdfAdminFormBase constructor.
-   */
-  public function __construct() {
-
-  }
-
-}