Issue #3158292 by Hardik_Patel_12, kiamlaluno: Remove unused variables from...

Issue #3158292 by Hardik_Patel_12, kiamlaluno: Remove unused variables from FormAjaxResponseBuilderTest.php file

(cherry picked from commit 0f823ffd)

core/tests/Drupal/Tests/Core/Form/FormAjaxResponseBuilderTest.php

@@ -54,7 +54,6 @@ public function testBuildResponseNoTriggeringElement() {
     $form_state = new FormState();
     $commands = [];
 
-    $expected = [];
     $this->expectException(HttpException::class);
     $this->formAjaxResponseBuilder->buildResponse($request, $form, $form_state, $commands);
   }
@@ -73,7 +72,6 @@ public function testBuildResponseNoCallable() {
     $form_state->setTriggeringElement($triggering_element);
     $commands = [];
 
-    $expected = [];
     $this->expectException(HttpException::class);
     $this->formAjaxResponseBuilder->buildResponse($request, $form, $form_state, $commands);
   }