Remove XML validation disabling deprecation.

Author: jwage

Diff for: lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php

@@ -5,7 +5,6 @@
 namespace Doctrine\ORM\Mapping\Driver;
 
 use Doctrine\Common\Collections\Criteria;
-use Doctrine\Deprecations\Deprecation;
 use Doctrine\ORM\Mapping\Builder\EntityListenerBuilder;
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\Mapping\MappingException;
@@ -56,15 +55,6 @@ public function __construct($locator, $fileExtension = self::DEFAULT_FILE_EXTENS
             );
         }
 
-        if (! $isXsdValidationEnabled) {
-            Deprecation::trigger(
-                'doctrine/orm',
-                'https://github.com/doctrine/orm/pull/6728',
-                'Using XML mapping driver with XSD validation disabled is deprecated'
-                . ' and will not be supported in Doctrine ORM 3.0.'
-            );
-        }
-
         if ($isXsdValidationEnabled && ! extension_loaded('dom')) {
             throw new LogicException(
                 'XSD validation cannot be enabled because the DOM extension is missing.'