How to Hide Sucuri Security - Auditing, Malware Scanner and Hardening Admin Menus

function plt_hide_sucuri_scanner_menus() {
	//Hide "Sucuri Security".
	remove_menu_page('sucuriscan');
	//Hide "Sucuri Security → Dashboard".
	remove_submenu_page('sucuriscan', 'sucuriscan');
	//Hide "Sucuri Security → Firewall (WAF)".
	remove_submenu_page('sucuriscan', 'sucuriscan_firewall');
	//Hide "Sucuri Security → Last Logins".
	remove_submenu_page('sucuriscan', 'sucuriscan_lastlogins');
	//Hide "Sucuri Security → Settings".
	remove_submenu_page('sucuriscan', 'sucuriscan_settings');
}

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

Where do I put this code?