[PATCH] Remove unnecessary code in libsvn_ra_git

Hi,

stsp mentioned that this code might actually be useful for externals
that are kept in Git, so I've been looking more closely at the code and
found a quick fix I could make.

[[[
On the 'ra-git' branch: Remove unnecessary code in libsvn_ra_git

* subversion/libsvn_ra_git/ra_plugin.c
  (do_git_fetch): no need for explicit connect before fetching
  (svn_ra_git__stat): look up the bob/tree as a generic object, which is
  what map_obj_to_direct() wants.
]]]

Cheers,
   cmn