Google is bidding adieu to Google Plus , an awkwardly named social network that the American search engine had launched four years ago hoping it would become a serious rival to Facebook.Google has spent the last several months chopping up Google Plus’s most useful pieces and making them separate services as it moves away from making Google Plus the central hub for all Google-related activity.Yesterday, the company announced its most drastic step for breaking up Google Plus.Google has announced more sweeping changes for Google Plus over the next few months as it restructures network into two distinctly separate products: streams and photos.