Remove code that has been redundant since update's "copy from" functionality was removed in r998193.
Remove code that has been redundant since update's "copy from" functionality
was removed in r998193.

* subversion/libsvn_wc/update_editor.c
  (file_baton): Remove all the 'copied_*' fields: they are never set.
  (apply_textdelta, merge_file, close_file): Remove code that used them.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1050091 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion