Merge branch '4.3' into 4.4

* 4.3:
  [4.3] Remove unused local variables

Author: nicolas-grekas

Tests/ConstraintViolationTest.php

@@ -14,7 +14,6 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\ConstraintViolation;
 use Symfony\Component\Validator\Tests\Fixtures\CustomArrayObject;
-use Symfony\Component\Validator\Tests\Fixtures\ToString;
 
 class ConstraintViolationTest extends TestCase
 {
@@ -134,7 +133,7 @@ public function testMessageCanBeStringableObject()
     public function testMessageCannotBeArray()
     {
         $this->expectException(\TypeError::class);
-        $violation = new ConstraintViolation(
+        new ConstraintViolation(
             ['cannot be an array'],
             '',
             [],
@@ -147,7 +146,7 @@ public function testMessageCannotBeArray()
     public function testMessageObjectMustBeStringable()
     {
         $this->expectException(\TypeError::class);
-        $violation = new ConstraintViolation(
+        new ConstraintViolation(
             new CustomArrayObject(),
             '',
             [],