Remove a function that has become a pointless wrapper.
Remove a function that has become a pointless wrapper.

* subversion/libsvn_wc/update_editor.c
  (prep_directory): Remove.
  (add_directory): Call svn_wc__ensure_directory directly, add comment
   about database problem.
  (close_file): Add comment about database problem.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion