postrm is in ksh 93u-1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #! /bin/sh -e
case "$1" in
    purge|remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
        # continue below
    ;;
    *)
        echo "postrm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
# Automatically added by dh_installmenu
if [ -x "`which update-menus 2>/dev/null`" ]; then update-menus ; fi
# End automatically added section
remove-shell /bin/ksh93
exit 0
 |