How to Hide the "Beaver Builder" Admin Menu

function plt_hide_beaver_builder_lite_version_menus() {
	//Hide the "Settings → Beaver Builder" menu.
	remove_submenu_page('options-general.php', 'fl-builder-settings');
}

add_action('admin_menu', 'plt_hide_beaver_builder_lite_version_menus', 11);

Where do I put this code?