TYPO3 Core

current code of tsconfig_help is

        if (!\TYPO3\CMS\Core\Extension\ExtensionManager::isLoaded('em')) {
            // Em is not loaded, so include the unzip class
            \TYPO3\CMS\Core\Utility\GeneralUtility::requireOnce(PATH_typo3 . 'sysext/em/classes/tools/class.tx_em_tools_unzip.php');
        }
        $unzip = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('tx_em_Tools_Unzip', $file);
        $ret = $unzip->extract(array('add_path' => $path));
        return is_array($ret);

ext is no "extensionmamanager" and unzip is not there anymore