Remove the dry_run_added hash from the merge code. This check is now much
easier handled by the added boolean in the merge_dir_baton.

* subversion/libsvn_client/merge.c
  (merge_cmd_baton_t): Remove variable.
  (dry_run_added_p): Remove function.
  (perform_obstruction_check): Remove dry run added checks.
  (merge_dir_opened): Remove unneeded code.
  (do_merge): Remove unneeded code.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1441083 13f79535-47bb-0310-9956-ffa450edef68