4.4.0-63.84) is not available, but a newer one is (4.4.0-142.168). We redirected you there.
    prerm is in fp-ide-3.0.0 3.0.0+dfsg-2.
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 | #! /bin/sh
set -e
# remove alternative
update-alternatives --remove fp /usr/bin/fp-3.0.0
# Debhelper code
 |