How to Hide Pagelayer Admin Menus

function plt_hide_pagelayer_menus() {
	//Hide "Pagelayer".
	remove_menu_page('pagelayer');
	//Hide "Pagelayer → Settings".
	remove_submenu_page('pagelayer', 'pagelayer');
	//Hide "Pagelayer → Website Settings".
	remove_submenu_page('pagelayer', 'pagelayer_website_settings');
	//Hide "Pagelayer → Theme Templates".
	remove_submenu_page('pagelayer', 'edit.php?post_type=pagelayer-template');
	//Hide "Pagelayer → Add New Template".
	remove_submenu_page('pagelayer', 'pagelayer_template_wizard');
	//Hide "Pagelayer → Getting Started".
	remove_submenu_page('pagelayer', 'pagelayer_getting_started');
	//Hide "Pagelayer → Go Pro".
	remove_submenu_page('pagelayer', 'https://pagelayer.com/pricing?from=plugin');
}

add_action('admin_menu', 'plt_hide_pagelayer_menus', 11);
Where do I put this code?