Update 'TODO'.

* TODO: Remove items about guix challenge & guix publish.

Signed-off-by: Vincent Legoll <vincent.legoll@gmail.com>
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

TODO

@@ -9,13 +9,6 @@ Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
   are permitted in any medium without royalty provided the copyright
   notice and this notice are preserved.
 
-* Add `guix publish' to publish the store using Guile's web server
-
-Generate narinfos and nars on the fly, upon HTTP GET requests.
-Ideally, extend .nix-cache-info to include the server's public key, and also
-reply to requests for .narinfo.sig.
-Optionally, use Guile-Avahi to publish the service.
-
 * MAYBE Add a substituter that uses the GNUnet DHT or [[http://libswift.org][libswift]]
 
 Would be neat if binaries could be pushed to and pulled from the GNUnet DHT or
@@ -74,11 +67,6 @@ per-package priorities, etc.
 Tests that need to download stuff or otherwise take a long time would only be
 run when that is defined.
 
-* add "guix challenge"
-
-Would download a substitute, and compare its contents against a (hopefully
-locally-built) copy.
-
 * guix build utils
 ** MAYBE Change ‘ld-wrapper’ to add RPATH for libs passed by file name