diff --git a/core/lib/Drupal/Core/Datetime/DateFormatter.php b/core/lib/Drupal/Core/Datetime/DateFormatter.php
index 5e81fce..3cc320d 100644
--- a/core/lib/Drupal/Core/Datetime/DateFormatter.php
+++ b/core/lib/Drupal/Core/Datetime/DateFormatter.php
@@ -212,7 +212,6 @@ public function formatInterval($interval, $granularity = 2, $langcode = NULL) {
   public function getSampleDateFormats($langcode = NULL, $timestamp = NULL, $timezone = NULL) {
     $language_code = $langcode ?: NULL;
     $timestamp = $timestamp ?: REQUEST_TIME;
-    $timezone = $timezone ?: NULL;
     // All date format characters for the PHP date() function.
     $date_characters = 'dDjlNSwzWFmMntLoYyaABgGhHisueIOPTZcrU';
     $date_chars = str_split($date_characters);