Remove unnecessary usages of DateTime

Author: nicolas-grekas

Command/AboutCommand.php

@@ -80,7 +80,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             ['Version', \PHP_VERSION],
             ['Architecture', (\PHP_INT_SIZE * 8).' bits'],
             ['Intl locale', class_exists(\Locale::class, false) && \Locale::getDefault() ? \Locale::getDefault() : 'n/a'],
-            ['Timezone', date_default_timezone_get().' (<comment>'.(new \DateTime())->format(\DateTime::W3C).'</>)'],
+            ['Timezone', date_default_timezone_get().' (<comment>'.(new \DateTimeImmutable())->format(\DateTimeInterface::W3C).'</>)'],
             ['OPcache', \extension_loaded('Zend OPcache') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL) ? 'true' : 'false'],
             ['APCu', \extension_loaded('apcu') && filter_var(\ini_get('apc.enabled'), \FILTER_VALIDATE_BOOL) ? 'true' : 'false'],
             ['Xdebug', \extension_loaded('xdebug') ? 'true' : 'false'],