changegroup: delete getlocalchangegroup As part of reducing the number of changegroup creation APIs, let's go ahead and delete this unused function. It appears to have been deprecated in the last release anyway. Differential Revision: https://phab.mercurial-scm.org/D667

changegroup: replace getlocalchangegroupraw with makestream As part of reducing the number of changegroup creation apis, let's replace calls to getlocalchangegroupraw with calls to makestream. Aside from one case of checking if there are no outgoing commits and returning None, this is pretty much a drop in replacement. Differential Revision: https://phab.mercurial-scm.org/D666