Removed stale code that was left lying around since the early cretaceous.
Paleontologists are still looking for clues about its original purpose.

* subversion/libsvn_delta/text_delta.c
  (svn_txdelta__apply_instructions): Remove prototype and implementation.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1618471 13f79535-47bb-0310-9956-ffa450edef68