Remove always-true condition

Introduced in symfony#45657

symfony/dependency-injection 6.4+ is required, so the class always exists

Author: GromNaN

src/Symfony/Component/HttpKernel/DependencyInjection/RegisterControllerArgumentLocatorsPass.php

@@ -51,8 +51,6 @@ public function process(ContainerBuilder $container): void
             }
         }
 
-        $emptyAutowireAttributes = class_exists(Autowire::class) ? null : [];
-
         foreach ($container->findTaggedServiceIds('controller.service_arguments', true) as $id => $tags) {
             $def = $container->getDefinition($id);
             $def->setPublic(true);
@@ -129,7 +127,7 @@ public function process(ContainerBuilder $container): void
                     /** @var \ReflectionParameter $p */
                     $type = preg_replace('/(^|[(|&])\\\\/', '\1', $target = ltrim(ProxyHelper::exportType($p) ?? '', '?'));
                     $invalidBehavior = ContainerInterface::IGNORE_ON_INVALID_REFERENCE;
-                    $autowireAttributes = $autowire ? $emptyAutowireAttributes : [];
+                    $autowireAttributes = null;
                     $parsedName = $p->name;
                     $k = null;
 
@@ -155,7 +153,7 @@ public function process(ContainerBuilder $container): void
                         $args[$p->name] = $bindingValue;
 
                         continue;
-                    } elseif (!$autowire || (!($autowireAttributes ??= $p->getAttributes(Autowire::class, \ReflectionAttribute::IS_INSTANCEOF)) && (!$type || '\\' !== $target[0]))) {
+                    } elseif (!$autowire || (!($autowireAttributes = $p->getAttributes(Autowire::class, \ReflectionAttribute::IS_INSTANCEOF)) && (!$type || '\\' !== $target[0]))) {
                         continue;
                     } elseif (is_subclass_of($type, \UnitEnum::class)) {
                         // do not attempt to register enum typed arguments if not already present in bindings