This file is indexed.

postrm is in devscripts 2.17.6+deb9u2.

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.

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#! /bin/sh
set -e

if [ "$1" = purge ]
then
    rm -f /etc/devscripts.conf* /etc/cowpoke.conf
fi

for cf in chdist debchange debsign pkgnames uupdate; do
    dpkg-maintscript-helper rm_conffile /etc/bash_completion.d/devscripts."$cf" 2.15.5~ devscripts -- "$@"
done