Remove now non-functional assignment of output arguments in the merge
processing.

* subversion/libsvn_client/merge.c
  (merge_file_changed): Remove unneeded state updates.
  (merge_file_added):  Remove unneeded state updates. Add return.
  (merge_file_deleted,
   merge_dir_opened,
   merge_dir_props_changed,
   merge_dir_added,
   merge_dir_deleted): Remove unneeded state updates.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1440315 13f79535-47bb-0310-9956-ffa450edef68