Removed old github-migration message.
Removed old github-migration message.

We don't need it anymore, this file should only be visible from the old SVN
repository.

svendaehne/bbci_public,bbci/bbci_public,IrinaNicolae/bbci_public,drsternburg/bbci_public,drsternburg/bbci_public,bsdlab/bbci_public,bsdlab/bbci_public,svendaehne/bbci_public,IrinaNicolae/bbci_public,bbci/bbci_public,drsternburg/bbci_public,MarkusWenzel/bbci_public,JohannesHoehne/bbci_public,IreneWinkler/bbci_public,JohannesHoehne/bbci_public,phoebe28/bbci_public,IreneWinkler/bbci_public,MarkusWenzel/bbci_public,bsdlab/bbci_public,JohannesHoehne/bbci_public,MarkusWenzel/bbci_public,phoebe28/bbci_public,IreneWinkler/bbci_public,bbci/bbci_public,IrinaNicolae/bbci_public,svendaehne/bbci_public,phoebe28/bbci_public