diff --git a/core/modules/block/src/BlockForm.php b/core/modules/block/src/BlockForm.php
index 4a9c48c..8a204ed 100644
--- a/core/modules/block/src/BlockForm.php
+++ b/core/modules/block/src/BlockForm.php
@@ -178,7 +178,6 @@ public function form(array $form, FormStateInterface $form_state) {
       '#suffix' => '</div>',
     );
     $form['#attached']['library'][] = 'block/drupal.block.admin';
-    $form['#cache']['tags'] = Cache::mergeTags(isset($form['#cache']['tags']) ? $form['#cache']['tags'] : [],  $config->getCacheTags());
     return $form;
   }
 
diff --git a/core/modules/book/src/Form/BookSettingsForm.php b/core/modules/book/src/Form/BookSettingsForm.php
index 143d995..dc05eb8 100644
--- a/core/modules/book/src/Form/BookSettingsForm.php
+++ b/core/modules/book/src/Form/BookSettingsForm.php
@@ -52,7 +52,6 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#required' => TRUE,
     );
     $form['array_filter'] = array('#type' => 'value', '#value' => TRUE);
-    $form['#cache']['tags'] = Cache::mergeTags(isset($form['#cache']['tags']) ? $form['#cache']['tags'] : [],  $config->getCacheTags());
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/contact/src/ContactFormEditForm.php b/core/modules/contact/src/ContactFormEditForm.php
index d219519..f027dbc 100644
--- a/core/modules/contact/src/ContactFormEditForm.php
+++ b/core/modules/contact/src/ContactFormEditForm.php
@@ -80,7 +80,6 @@ public function form(array $form, FormStateInterface $form_state) {
       '#default_value' => $default_form === $contact_form->id(),
     );
 
-    $form['#cache']['tags'] = Cache::mergeTags(isset($form['#cache']['tags']) ? $form['#cache']['tags'] : [],  $config->getCacheTags());
     return $form;
   }