WPI 4.5 without Web Farm Framework 2.2

I can not find Web Farm Framework 2.2 in Web Farm Platform 4.5 .

Does it mean Web Farm Framework is abandoned by microsoft or what. Since server 2012 and IIS 8 are out for some time.  

But we still have lots of web sites using web farm framework 2.2 and we want to upgrade them to .net 4.5.