Remove deprecated code paths

Author: nicolas-grekas

Tests/Compiler/ResolveChildDefinitionsPassTest.php

@@ -12,16 +12,13 @@
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
 use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\Compiler\ResolveChildDefinitionsPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
 
 class ResolveChildDefinitionsPassTest extends TestCase
 {
-    use ExpectDeprecationTrait;
-
     public function testProcess()
     {
         $container = new ContainerBuilder();

Tests/DefinitionTest.php

@@ -12,16 +12,13 @@
 namespace Symfony\Component\DependencyInjection\Tests;
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\Reference;
 
 class DefinitionTest extends TestCase
 {
-    use ExpectDeprecationTrait;
-
     public function testConstructor()
     {
         $def = new Definition('stdClass');

Tests/Loader/PhpFileLoaderTest.php

@@ -14,7 +14,6 @@
 require_once __DIR__.'/../Fixtures/includes/AcmeExtension.php';
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
 use Symfony\Component\Config\Builder\ConfigBuilderGenerator;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -25,8 +24,6 @@
 
 class PhpFileLoaderTest extends TestCase
 {
-    use ExpectDeprecationTrait;
-
     public function testSupports()
     {
         $loader = new PhpFileLoader(new ContainerBuilder(), new FileLocator());

Tests/Loader/YamlFileLoaderTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
 use Symfony\Component\Config\Exception\FileLocatorFileNotFoundException;
 use Symfony\Component\Config\Exception\LoaderLoadException;
 use Symfony\Component\Config\FileLocator;
@@ -46,8 +45,6 @@
 
 class YamlFileLoaderTest extends TestCase
 {
-    use ExpectDeprecationTrait;
-
     protected static $fixturesPath;
 
     public static function setUpBeforeClass(): void