ext_tables.php

<?php
/*
 *
 * Configuration of theme_bootstrap
 *
 */
//if(!\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::isLoaded('themes')) {
//    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile($_EXTKEY, 'Configuration/TypoScript', $_EXTKEY . ': theme');
//}