How to Hide WP Visitor Statistics (Real Time Traffic) Admin Menus

function plt_hide_wp_stats_manager_menus() {
	//Hide "Visitor Statistics".
	remove_menu_page('wsm');
	//Hide "Visitor Statistics → Traffic".
	remove_submenu_page('wsm', 'wsm_traffic');
	//Hide "Visitor Statistics → Traffic Sources".
	remove_submenu_page('wsm', 'wsm_trafficsrc');
	//Hide "Visitor Statistics → Visitors".
	remove_submenu_page('wsm', 'wsm_visitors');
	//Hide "Visitor Statistics → Content".
	remove_submenu_page('wsm', 'wsm_content');
	//Hide "Visitor Statistics → I.P. Exclusion".
	remove_submenu_page('wsm', 'wsm_ipexc');
	//Hide "Visitor Statistics → Add ons".
	remove_submenu_page('wsm', 'wsm_addons');
	//Hide "Visitor Statistics → Settings".
	remove_submenu_page('wsm', 'wsm_settings');
}

add_action('admin_menu', 'plt_hide_wp_stats_manager_menus', 21);

Where do I put this code?