Resolve #3526907 Client auto-save conflicts

Closes #3526907

src/Controller/ApiLayoutController.php

@@ -481,11 +481,6 @@ final class ApiLayoutController {
   }
 
   private function validateAutoSaves(EntityInterface $entity, array $body): void {
-    // @todo Remove the special case for testing in https://drupal.org/i/3526907.
-    // @phpstan-ignore-next-line
-    if (!(drupal_valid_test_ua() && \Drupal::installProfile() !== 'nightwatch_testing')) {
-      return;
-    }
     if (!\array_key_exists('autoSaves', $body)) {
       throw new BadRequestHttpException('Missing autoSaves');
     }