This file is indexed.

postrm is in sensible-utils 0.0.9ubuntu0.16.04.1.

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.

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#! /bin/sh

set -e

case "$1" in
    (remove|disappear)
    if which update-mime >/dev/null;
    then
            update-mime
    fi
        ;;
    (upgrade|failed-upgrade|purge|abort-install|abort-upgrade)
        ;;
    (*)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac