Undeprecate doctrine:cache:clear-metadata command (fixes #1432)

Command/Proxy/ClearMetadataCacheDoctrineCommand.php

@@ -7,12 +7,8 @@
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 
-use function trigger_deprecation;
-
 /**
  * Command to clear the metadata cache of the various cache drivers.
- *
- * @deprecated
  */
 class ClearMetadataCacheDoctrineCommand extends MetadataCommand
 {
@@ -39,13 +35,6 @@ protected function configure()
      */
     protected function execute(InputInterface $input, OutputInterface $output)
     {
-        trigger_deprecation(
-            'doctrine/doctrine-bundle',
-            '2.3',
-            'The "%s" (doctrine:cache:clear-metadata) is deprecated, metadata cache now uses PHP Array cache which can not be cleared.',
-            self::class
-        );
-
         DoctrineCommandHelper::setApplicationEntityManager($this->getApplication(), $input->getOption('em'));
 
         return parent::execute($input, $output);