diff -r a3c7bd201da7 -r 9590972c2caf lib/scripts/update_sub_sup
--- a/lib/scripts/update_sub_sup	Sun Feb 28 21:19:58 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,44 +0,0 @@
-#!/usr/bin/env perl
-#
-# Author: Makarius
-#
-# update_sub_sup - update Isabelle symbols involving sub/superscripts
-
-use warnings;
-use strict;
-
-sub update_sub_sup {
-    my ($file) = @_;
-
-    open (FILE, $file) || die $!;
-    undef $/; my $text = <FILE>; $/ = "\n";         # slurp whole file
-    close FILE || die $!;
-
-    $_ = $text;
-
-    s/\Q\<^isub>\E/\\<^sub>/g;
-    s/\Q\<^isup>\E/\\<^sup>/g;
-    s/\Q\<onesuperior>\E/\\<^sup>1/g;
-    s/\Q\<twosuperior>\E/\\<^sup>2/g;
-    s/\Q\<threesuperior>\E/\\<^sup>3/g;
-
-    my $result = $_;
-
-    if ($text ne $result) {
-        print STDERR "changing $file\n";
-        if (! -f "$file~~") {
-            rename $file, "$file~~" || die $!;
-        }
-        open (FILE, "> $file") || die $!;
-        print FILE $result;
-        close FILE || die $!;
-    }
-}
-
-
-## main
-
-foreach my $file (@ARGV) {
-  eval { &update_sub_sup($file); };
-  if ($@) { print STDERR "*** update_sub_sup $file: ", $@, "\n"; }
-}