Bug#927217: cdimage.debian.org: Live media installed using d-i has duplicate apt entries

[Jonathan Carter]

Package: cdimage.debian.org
Severity: important

When installing a Debian live image using d-i, the apt sources are configured
in /etc/apt/sources.list as expected. However, an additional
/etc/apt/sources.list.d/base.list is still present from the live media, 
resulting
in duplicate apt source entries and warnings displayed to the user every time
they perform common apt functions like apt update.