Bug#921951: debian-installer: Remove beep-udeb

[Hilko Bengen <bengen@debian.org>]

Package: debian-installer
Severity: normal

Dear Maintainers,

as of now the beep package is still going to be shipped with buster
despite having CVE-worthy bugs with no maintainer activity in several
months. The only apparent reason for this is that it is included by d-i
on one specific armel[1] flavor -- I am not even sure if it would
actually be needed (or even used) there.

Please consider removing the package from the installer. Thank you.

Cheers,
-Hilko

[1] debian-installer-20190118/build/pkg-lists/netboot/network-console/armel/ixp4xx.cfg