Issue #2080013 by mrsinguyen: Remove Unused local variable from...

Issue #2080013 by mrsinguyen: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Form/ImageToolkitForm.php.

core/modules/system/lib/Drupal/system/Form/ImageToolkitForm.php

@@ -102,7 +102,7 @@ public function submitForm(array &$form, array &$form_state) {
 
     // Call the form submit handler for each of the toolkits.
     // Get the toolkit settings forms.
-    foreach ($this->availableToolkits as $id => $toolkit) {
+    foreach ($this->availableToolkits as $toolkit) {
       $toolkit->settingsFormSubmit($form, $form_state);
     }