How to Hide EGPS - Easy Sell for Google Photo Admin Menus

function plt_hide_egps_easy_sell_for_google_photo_menus() {
	//Hide "EGPS".
	remove_menu_page('easy-photo-sell');
	//Hide "EGPS → EGPS".
	remove_submenu_page('easy-photo-sell', 'easy-photo-sell');
	//Hide "EGPS → EGPS - Settings".
	remove_submenu_page('easy-photo-sell', 'easy-photo-sell_settings');
	//Hide "EGPS → EGPS - Emails".
	remove_submenu_page('easy-photo-sell', 'email_settings');
	//Hide "EGPS → EGPS - Albums".
	remove_submenu_page('easy-photo-sell', 'easy-photo-sell_albums');
	//Hide "EGPS → EGPS - Orders".
	remove_submenu_page('easy-photo-sell', 'easy-photo-sell_orders');
	//Hide "EGPS → EGPS - HELP".
	remove_submenu_page('easy-photo-sell', 'egps_helpmenu');
}

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