minor symfony#59389 [DoctrineBridge] clean up code for doctrine/persistence 2.x (xabbuh)

This PR was merged into the 7.1 branch.

Discussion
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[DoctrineBridge] clean up code for doctrine/persistence 2.x

| Q             | A
| ------------- | ---
| Branch?       | 7.1
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

I missed this when merging `6.4` up after symfony#59185

Commits
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e102b89 clean up code for doctrine/persistence 2.x

Author: nicolas-grekas

src/Symfony/Bridge/Doctrine/Tests/Security/RememberMe/DoctrineTokenProviderTest.php

@@ -122,9 +122,7 @@ protected function bootstrapProvider(): DoctrineTokenProvider
         $config = ORMSetup::createConfiguration(true);
         $config->setSchemaManagerFactory(new DefaultSchemaManagerFactory());
 
-        if (!class_exists(\Doctrine\Persistence\Mapping\Driver\AnnotationDriver::class)) { // doctrine/persistence >= 3.0
-            $config->setLazyGhostObjectEnabled(true);
-        }
+        $config->setLazyGhostObjectEnabled(true);
 
         $connection = DriverManager::getConnection([
             'driver' => 'pdo_sqlite',