How to Hide CartShark Security Admin Menus

function plt_hide_cartshark_security_menus() {
	//Hide the "CartShark" menu.
	remove_menu_page('cartshark');
	//Hide the "CartShark → Dashboard" menu.
	remove_submenu_page('cartshark', 'cartshark');
	//Hide the "CartShark → Settings" menu.
	remove_submenu_page('cartshark', 'cartshark-settings');
}

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

Where do I put this code?