How to Hide Import Content in WordPress & WooCommerce with Excel Admin Menus

function plt_hide_content_excel_importer_menus() {
	//Hide the "WPFactory" menu.
	remove_menu_page('wpfactory');
	//Hide the "WPFactory → Recommendations" menu.
	remove_submenu_page('wpfactory', 'wpfactory-cross-selling');
	//Hide the "WPFactory → Content Excel Importer" menu.
	remove_submenu_page('wpfactory', 'content-excel-importer');
}

add_action('admin_menu', 'plt_hide_content_excel_importer_menus', 12);

Where do I put this code?