This file is indexed.

prerm is in links2 2.8-1ubuntu1.

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

case "$1" in
    remove|deconfigure)
        update-alternatives --quiet --remove www-browser /usr/bin/links2
        update-alternatives --quiet --remove x-www-browser /usr/bin/xlinks2
        ;;
    *)
esac