Remove broken and unnecessary constructor

src/Form/RegexRedirectForm.php

@@ -3,7 +3,6 @@
 namespace Drupal\regex_redirect\Form;
 
 use Drupal\Component\Utility\UrlHelper;
-use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Entity\ContentEntityForm;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Language\Language;
@@ -19,23 +18,6 @@ use Drupal\regex_redirect\Entity\RegexRedirect;
  */
 class RegexRedirectForm extends ContentEntityForm {
 
-  /**
-   * The config factory.
-   *
-   * @var \Drupal\Core\Config\ConfigFactoryInterface
-   */
-  protected $configFactory;
-
-  /**
-   * Constructs a RegexRedirectForm object.
-   *
-   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
-   *   The configuration factory.
-   */
-  public function __construct(ConfigFactoryInterface $config_factory) {
-    $this->configFactory = $config_factory;
-  }
-
   /**
    * {@inheritdoc}
    *
@@ -269,7 +251,7 @@ class RegexRedirectForm extends ContentEntityForm {
    *   The source path.
    */
   protected function setBlackListErrors(FormStateInterface $form_state, $source_path) {
-    $blacklisted_source_paths = $this->configFactory->get('regex_redirect.settings')->get('blacklisted_source_paths');
+    $blacklisted_source_paths = parent::config('regex_redirect.settings')->get('blacklisted_source_paths');
     foreach ($blacklisted_source_paths as $path) {
       if (strpos($source_path, ltrim($path, '/')) === 0) {
         $form_state->setErrorByName('redirect_redirect', $this->t(