How to Hide Feature Status Check Admin Menus

function plt_hide_feature_status_check_menus() {
	//Hide the "Appearance → Status Check" menu.
	remove_submenu_page('themes.php', 'fsc_admin_appearance_menu');
	//Hide the "Plugins → Status Check" menu.
	remove_submenu_page('plugins.php', 'fsc_admin_plugins_menu');
	//Hide the "Settings → Feature Status Check" menu.
	remove_submenu_page('options-general.php', 'feature-status-check/feature-status-check.php');
}

add_action('admin_menu', 'plt_hide_feature_status_check_menus', 201);

Where do I put this code?