postrm is in printer-driver-pnm2ppa 1.13+nondbs-0ubuntu1.
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 26 27 28 29 | #!/bin/sh
set -e
# Purge actions
if [ "$1" = purge ] ; then
	# Get rid of configuration file
	if [ -f /etc/pnm2ppa.conf ]; then
		rm -f /etc/pnm2ppa.conf
	fi
	# We're pretty sure that the pnm2ppa magicfilter files were generated
	# or installed by pnm2ppa packages.
	if [ -d /etc/magicfilter ] ; then
		for i in /etc/magicfilter/p?m2ppa*-filter ; do
			rm -f $i || true
		done
		# If there are no files in the magicfilter directory, remove.
		# rmdir will fail if there are files...  Not an error.
		rmdir /etc/magicfilter 2> /dev/null || true
	fi
fi
# Automatically added by dh_installdebconf
if [ "$1" = purge ] && [ -e /usr/share/debconf/confmodule ]; then
	. /usr/share/debconf/confmodule
	db_purge
fi
# End automatically added section
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