Issue #3307886: Transition form prevents custom access control

src/Form/WebformWorkflowTransitionConfirmForm.php

@@ -83,25 +83,7 @@ class WebformWorkflowTransitionConfirmForm extends ConfirmFormBase {
     $this->transition = $this->workflow->getTypePlugin()
       ->getTransition($transition);
 
-    // Create generic confirmation form:
-    $form = parent::buildForm($form, $form_state);
-
-    // Check access to transition, for better UX:
-    /** @var \Drupal\webform_workflows_element\Service\WebformWorkflowsManager $workflows_manager */
-    $workflows_manager = Drupal::service('webform_workflows_element.manager');
-    $account = Drupal::currentUser();
-    $access = $workflows_manager->checkAccessForSubmissionAndTransition($this->workflow, $account, $this->webform, $this->transition);
-    if (!$access) {
-      $form['actions']['submit']['#access'] = FALSE;
-      $form['actions']['cancel']['#title'] = $this->t('Cancel');
-      $form['description']['#markup'] = $this->t('Either the "@transition" transition is not possible or you do not have sufficient access to perform it on submission @id as part of the "@workflow" workflow.', [
-        '@workflow' => $this->workflow->label(),
-        '@transition' => $this->transition->label(),
-        '@id' => $this->webform_submission->id(),
-      ]);
-    }
-
-    return $form;
+    return parent::buildForm($form, $form_state);
   }
 
   /**