Remove some dead code (it is over in old-and-busted.c)

* subversion/libsvn_wc/entries.c:
  (string_to_opt_revision, opt_revision_to_string,
      unserialize_file_external, serialize_file_external,
      resolve_to_defaults): removed


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@875994 13f79535-47bb-0310-9956-ffa450edef68
1 file changed