How to Hide W2E Image Optimizer Admin Menus

function plt_hide_way2enjoy_compress_images_menus() {
	//Hide the "Media → Way2enjoy Image" menu.
	remove_submenu_page('upload.php', 'wp-way2enjoy');
	//Hide the "Settings → Way2enjoy" menu.
	remove_submenu_page('options-general.php', 'wp-way2enjoy');
}

add_action('admin_menu', 'plt_hide_way2enjoy_compress_images_menus', 11);

Where do I put this code?