How to Hide the "Gettext override translations" Admin Menu

function plt_hide_gettext_override_translations_menus() {
	//Hide the "Plugins → Gettext override translations" menu.
	remove_submenu_page('plugins.php', 'gettext-override-translations');
}

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

Where do I put this code?