postrm is in xletters 1.1.1-5.
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 22 23 24 25 | #! /bin/sh
# postrm script for xletters
#
# see: dh_installdeb(1)
set -e
case "$1" in
       purge)
	# Remove high score files on purge.
        rm -f /var/games/xletters/scores
        rmdir /var/games/xletters /var/games 2>/dev/null || true
	;;
       remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
        ;;
    *)
        echo "postrm called with unknown argument \`$1'" >&2
        exit 0
esac
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