prerm is in igtf-policy-mics 1.88-1.
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 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51  | #!/bin/sh
# prerm script for igtf-policy-bundle
#
set -e
. /usr/share/debconf/confmodule
profile=mics
location=/etc/grid-security/certificates
if db_get igtf-policy/location ; then
    location="$RET"
fi
case "$1" in
    remove)
	# Remove all the links that were made to the profile files,
	# and any CRLs that were downloaded.
	for f in `find /usr/share/igtf-policy/${profile}/ -maxdepth 1 -not -type d -print` ; do
	    rm -f "$location"/`basename $f`
	    rm -f "$location"/`basename ${f%.*}`.r0
    	done
	if [ -f "$location"/.created_by_igtf_policy ]; then
	    filesleft=`ls -a "$location" | wc -l`
	    if [ $filesleft -eq 3 ]; then
		rm  "$location"/.created_by_igtf_policy
		rmdir "$location"
	    fi
	fi
	;;
    upgrade|deconfigure)
	# Remove all the links that were made to the profile files,
	# but leave the CRLs that were downloaded.
	for f in `find /usr/share/igtf-policy/${profile}/ -maxdepth 1 -not -type d -print` ; do
	    rm -f "$location"/`basename $f`
    	done
    ;;
    failed-upgrade)
    ;;
    *)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
exit 0
 |