diff --git a/core/modules/big_pipe/tests/modules/big_pipe_test/src/BigPipeTestController.php b/core/modules/big_pipe/tests/modules/big_pipe_test/src/BigPipeTestController.php
index 5e07d07..30594a5 100644
--- a/core/modules/big_pipe/tests/modules/big_pipe_test/src/BigPipeTestController.php
+++ b/core/modules/big_pipe/tests/modules/big_pipe_test/src/BigPipeTestController.php
@@ -123,22 +123,6 @@ public static function responseException() {
   }
 
   /**
-   * #lazy_builder callback; builds markup using a provided adjective.
-   *
-   * @param string $adjective
-   *   The adjective to use in the rendered markup.
-   *
-   * @return array
-   *   The render array.
-   */
-  public static function placeholderContent($adjective) {
-    return [
-      '#markup' => t('I think llamas are @adjective', ['@adjective' => $adjective]),
-      '#cache' => ['max-age' => 0]
-    ];
-  }
-
-  /**
    * #lazy_builder callback; returns the current count.
    *
    * @see \Drupal\big_pipe\Tests\BigPipeTest::testBigPipeMultipleOccurrencePlaceholders()