Following up on r1570022, remove the now unneeded wrapping of the diff
processor. This wrapping was already handled in diff_file_added(), and
this patch applies the same transform in diff_dir_added().

Removing this wrapping should allow future svn diff --git output
improvements in cases where we used to miss information.

* subversion/libsvn_client/diff.c
  (diff_driver_info_t): Remove unused variables.
  (diff_dir_added): Apply show_copies_as_adds transform.
  (diff_repos_repos,
   diff_repos_wc): Remove setters of unused variables.

  (svn_client_diff6,
   svn_client_diff_peg6): Remove lossy transformation.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1570133 13f79535-47bb-0310-9956-ffa450edef68