Revert "Add debian-installer preseed file to override apt configuration"

This reverts commit 9eeb33247b.

live-build puts the preseed file in the initrd so it actually replaces
the preseed file put in place by debian-installer. That preseed
actually hardcodes the release for the need of the mini.iso but
the live image does not need such an hardcode as d-i can figure
it out by itself by analyzing the repositories on the ISO.

auto/config

@@ -85,24 +85,6 @@ if [ -n "$enable_pu" ]; then
 		> config/archives/kali-proposed-updates.list.binary
 fi
 
-if [ -e config/includes.installer/preseed.cfg ]; then
-	sed -i -e '/^# KALI OPTIONS/,$ d' config/includes.installer/preseed.cfg
-fi
-
-cat >>config/includes.installer/preseed.cfg <<END
-# KALI OPTIONS
-# Default repository information
-d-i mirror/country string enter information manually
-d-i mirror/suite string $dist
-d-i mirror/http/hostname string http.kali.org
-d-i mirror/http/directory string /kali
-
-# Add our own security mirror
-d-i apt-setup/local0/repository string http://security.kali.org/kali-security $dist/updates main contrib non-free
-d-i apt-setup/local0/comment string Security updates
-d-i apt-setup/local0/source boolean false
-END
-
 lb config noauto \
 	--distribution "$dist" \
 	--debian-installer-distribution "$dist" \