OEL-1367: Simplify how the region is added to block settings on submit.

modules/oe_whitelabel_search/src/Plugin/Block/SearchBlock.php

@@ -216,7 +216,7 @@ class SearchBlock extends BlockBase implements ContainerFactoryPluginInterface {
     $values = $form_state->getValues();
     $this->setConfigurationValue('form', [
       'action' => $form_state->getValue('form_action'),
-      'region' => $form_state->getValue('region'),
+      'region' => $form_state->getCompleteFormState()->getValue('region'),
     ]);
     $input = $values['input'];
     $this->setConfigurationValue('input', [
@@ -241,9 +241,6 @@ class SearchBlock extends BlockBase implements ContainerFactoryPluginInterface {
   public function blockValidate($form, FormStateInterface $form_state): void {
     $values = $form_state->getValues();
 
-    $completeForm = $form_state->getCompleteForm();
-    $form_state->setValue('region', $completeForm['region']['#value']);
-
     if (!$this->moduleHandler->moduleExists('views') || !$this->moduleHandler->moduleExists('search_api_autocomplete')) {
       return;
     }