How to Hide WPReplace批量替换插件 Admin Menus

function plt_hide_wpreplace_menus() {
	//Hide the "Tools → WPReplace批量替换" menu.
	remove_submenu_page('tools.php', 'wpreplace-settings');
	//Hide the "Settings → WPReplace批量替换" menu.
	remove_submenu_page('options-general.php', 'wpreplace-settings');
}

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

Where do I put this code?