How to Hide WP Scripts & Styles Optimizer Admin Menus

function plt_hide_wp_script_optimizer_menus() {
	//Hide the "WP Scripts & Styles Optimizer" menu.
	remove_menu_page('wpso_global');
	//Hide the "WP Scripts & Styles Optimizer → Global" menu.
	remove_submenu_page('wpso_global', 'wpso_global');
	//Hide the "WP Scripts & Styles Optimizer → Single pages" menu.
	remove_submenu_page('wpso_global', 'wpso_single');
}

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

Where do I put this code?