prerm is in blcr-dkms 0.8.2-15ubuntu2.
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 | #!/bin/sh
set -e
# Get the package version, which is the version of batman-adv-dkms
package=blcr
version=`dpkg-query -W -f='${Version}' "$package-dkms" \
| sed -e 's/[+-].*//'`
dkms remove -m "$package" -v "$version" --all || true
|