Issue #3514028 by sv: Make optional block title

Closes #3514028

src/Plugin/Block/DataPolicyInformBlock.php

@@ -171,7 +171,7 @@ class DataPolicyInformBlock extends BlockBase implements ContainerFactoryPluginI
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     $form = parent::buildConfigurationForm($form, $form_state);
 
-    $form['label']['#disabled'] = $form['label_display']['#disabled'] = TRUE;
+    $form['label']['#disabled'] = TRUE;
 
     return $form;
   }