Remove unneeded +build linux.
Remove unneeded +build linux.

This works for me on my macbook. Revert if I messed something up.

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