Pierre-Yves David <pierre-yves.david@fb.com> [Fri, 18 Mar 2016 08:14:45 -0700] rev 1913
readme: remove the part about 3.7 and hgext3rd
We are using direct path already so we don't need any magic here. The
'hgext3rd.'bit is only required (for 3.7) when the module is installed and we
rely on sys.path to find it.