Some packages are orphaned or did not build for two releases and will be retired when Fedora (F20) is branched, unless someone adopts them. If you know for sure that the package should be retired, please do so now with a proper reason here.
According to schedule, branching will occur not earlier than 2013-08-20. The packages will be retired shortly before.
You can read the full list of the packages that are orphaned, in this e-mail