fix(test): drop stale serializer 8.1 deprecation guard on ported enum test

The 3-way merge of #8389 correctly dropped the deprecation-expectation
guard (imports + #[IgnoreDeprecations] + version check) that #8287 had
already removed from the sibling test, since 4.4's DenormalizationViolationFactory
prefers getNotNormalizableValueErrors() over the deprecated getErrors()
whenever it exists and so never triggers that deprecation on symfony/serializer
>=8.1. But #8389 also introduced a brand-new test reusing the same
now-unimported VersionParser/IgnoreDeprecations symbols, which the
textual merge could not reconcile: it left the merged file referencing
classes with no matching use statement. Remove the same stale guard
from the new test for the same reason #8287 removed it from the old one.

Author: soyuka

tests/Functional/EnumDenormalizationValidationTest.php

@@ -80,13 +80,8 @@ public function testInvalidBackedEnumValueWithCollectDenormalizationErrors(): vo
     /**
      * @see https://github.com/api-platform/core/issues/8388
      */
-    #[IgnoreDeprecations]
     public function testWrongTypeForBackedEnumReportsAcceptedScalarTypes(): void
     {
-        if (InstalledVersions::satisfies(new VersionParser(), 'symfony/serializer', '>=8.1')) {
-            $this->expectUserDeprecationMessage('Since symfony/serializer 8.1: The "Symfony\Component\Serializer\Exception\PartialDenormalizationException::getErrors()" method is deprecated, use "Symfony\Component\Serializer\Exception\PartialDenormalizationException::getNotNormalizableValueErrors()" instead.');
-        }
-
         $response = static::createClient()->request('POST', '/enum_validation_resources_collect', [
             'headers' => ['Content-Type' => 'application/ld+json'],
             'json' => ['gender' => true],