Issue #3388204 by quietone, atul4drupal, xjm: Fix return type in...

Issue #3388204 by quietone, atul4drupal, xjm: Fix return type in \Drupal\Tests\rest\Functional\ResourceTestBase::recursiveKSort()

(cherry picked from commit 321492b8)

core/modules/rest/tests/src/Functional/ResourceTestBase.php

@@ -487,9 +487,6 @@ protected function decorateWithXdebugCookie(array $request_options) {
    *
    * @param array $array
    *   An array to sort.
-   *
-   * @return array
-   *   The sorted array.
    */
   protected static function recursiveKSort(array &$array) {
     // First, sort the main array.
@@ -501,8 +498,6 @@ protected static function recursiveKSort(array &$array) {
         static::recursiveKSort($value);
       }
     }
-
-    return $array;
   }
 
 }