How to Hide WP Cloud Gallery Admin Menus

function plt_hide_wp_cloud_gallery_menus() {
	//Hide "CloudGallery".
	remove_menu_page('wpcloudgallery_settings_page');
	//Hide "CloudGallery → CloudGallery".
	remove_submenu_page('wpcloudgallery_settings_page', 'wpcloudgallery_settings_page');
	//Hide "CloudGallery → SmugMug".
	remove_submenu_page('wpcloudgallery_settings_page', 'wpcloudgallery_settings_page_smugmug');
	//Hide "CloudGallery → YouTube".
	remove_submenu_page('wpcloudgallery_settings_page', 'wpcloudgallery_settings_page_youtube');
	//Hide "CloudGallery → API Key".
	remove_submenu_page('wpcloudgallery_settings_page', 'wpcloudgallery_settings_page_apikey');
}

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

Where do I put this code?