How to Hide Recras WordPress Plugin Admin Menus

function plt_hide_recras_menus() {
	//Hide "Recras".
	remove_menu_page('recras');
	//Hide "Recras → Settings".
	remove_submenu_page('recras', 'recras');
	//Hide "Recras → Cache".
	remove_submenu_page('recras', 'recras-clear-cache');
	//Hide "Recras → Documentation".
	remove_submenu_page('recras', 'recras-documentation');
	//Hide "Recras → Shortcodes".
	remove_submenu_page('recras', 'recras-shortcodes');
}

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

Where do I put this code?