deleted file mode 100644
--- a/build-aux/diff-template
+++ /dev/null
@@ -1,59 +0,0 @@
-#!/bin/sh
-#
-# To apply this patch, cd to the top level Octave source directory and
-# run this file through /bin/sh.  It will first remove any files that
-# have been deleted from the source distribution since the last
-# release and then update the sources with patch(1).
-#
-# Diffs for updating *.ps, *.dvi, and *.info* files are not included
-# because they can be recreated from the Texinfo files using TeX and
-# makeinfo.
-#
-# Diffs for updating parse.cc and y.tab.h are not included because
-# they can be recreated from the file parse.y using bison.
-#
-# Diffs for updating lex.cc are not included because it can be
-# recreated from lex.l using flex.
-#
-# Diffs for updating the configure script are not included because
-# it can be recreated from configure.in using autoconf.
-#
-# John W. Eaton
-# jwe@octave.org
-
-if test -f src/octave.cc ; then
-  true
-else
-  echo '***********************************************************' 1>&2
-  echo 'You must run this script in the top-level octave directory!' 1>&2
-  echo '***********************************************************' 1>&2
-  exit 1
-fi
-
-echo 'removing the bsd-math directory'
-rm -rf bsd-math
-
-echo 'creating libcruft/slatec-fn directory'
-mkdir libcruft/slatec-fn
-
-echo 'removing old test files'
-rm -f test/octave.test/index.exp
-rm -f test/octave.test/prefer.exp
-rm -f test/octave.test/zero-one.exp
-
-echo 'creating directories for new test files'
-mkdir test/octave.test/index/dfi-f
-mkdir test/octave.test/index/dfi-t
-mkdir test/octave.test/prefer
-mkdir test/octave.test/zero-one/fff
-mkdir test/octave.test/zero-one/fft
-mkdir test/octave.test/zero-one/ftf
-mkdir test/octave.test/zero-one/tff
-mkdir test/octave.test/zero-one/ftt
-mkdir test/octave.test/zero-one/tft
-mkdir test/octave.test/zero-one/ttf
-mkdir test/octave.test/zero-one/ttt
-
-echo 'patching existing files'
-patch -p1 << \PATCH_EOF
-PATCH_EOF