linux/debian/templates/image.prerm.in

#!/bin/sh
set -e

[ "$1" = remove ] || exit 0

version='@abiname@@localversion@'
image_path="/boot/@image-stem@-${version}"

if command -v linux-check-removal >/dev/null ; then
    linux-check-removal "${version}"
fi

if [ -d /etc/kernel/prerm.d ] ; then
    DEB_MAINT_PARAMS="$*" \
    run-parts --report --exit-on-error \
      "--arg=${version}" \
      "--arg=${image_path}" \
    /etc/kernel/prerm.d
fi

exit 0