remove global constant var map pfs.ReservedCommitIDs from src/pfs/pfs.go
remove global constant var map pfs.ReservedCommitIDs from src/pfs/pfs.go

klucar/pachyderm,ShengjieLuo/pachyderm,ShengjieLuo/pachyderm,sambooo/pachyderm,klucar/pachyderm,ShengjieLuo/pachyderm,alexdebrie/pachyderm,alexdebrie/pachyderm,alexdebrie/pachyderm,sambooo/pachyderm,klucar/pachyderm,sambooo/pachyderm