Revert "britney.conf: Add components for d-i"

Turns out it does not work (as d-i does not have a Sources file as
they would be redundant).

This reverts commit bb79d9333f.

britney.conf

@@ -6,7 +6,7 @@ TPU               = /srv/ftp-master.debian.org/ftp/dists/testing-proposed-update
 PU                = /srv/ftp-master.debian.org/ftp/dists/proposed-updates
 UNSTABLE          = /srv/ftp-master.debian.org/ftp/dists/unstable
 
-COMPONENTS        = main, non-free, contrib, main/debian-installer, non-free/debian-installer, contrib/debian-installer
+COMPONENTS        = main, non-free, contrib
 
 # Output
 NONINST_STATUS    = /srv/release.debian.org/britney/var/data-b2/non-installable-status

britney_nobreakall.conf

@@ -6,7 +6,7 @@ TPU               = /srv/ftp-master.debian.org/ftp/dists/testing-proposed-update
 PU                = /srv/ftp-master.debian.org/ftp/dists/proposed-updates
 UNSTABLE          = /srv/ftp-master.debian.org/ftp/dists/unstable
 
-COMPONENTS        = main, non-free, contrib, main/debian-installer, non-free/debian-installer, contrib/debian-installer
+COMPONENTS        = main, non-free, contrib
 
 # Output
 NONINST_STATUS    = /srv/release.debian.org/britney/var/data-b2/non-installable-status