remove nevii stage, not necessary

When weasel told me about this, he did say it was optional. And in
practice, nevii is fast enough: it runs `ud-replicate` every 5 minutes
(like everyone else) and so syncs DNS changes with the LDAP server
fast enough so that we don't need ot bother with this.

tsa/howto/new-machine.mdwn

@@ -113,13 +113,6 @@ All commands to be run as root unless otherwise noted.
     This step is necessary to have Puppet open its firewall to the new
     node.
 
- 5. generate DNS entries, on nevii:
-
-        sudo -H ud-replicate
-
-    TODO: skip that step? `ud-replicate` runs every 5 minutes on
-    `nevii` anyways.
-
  6. bootstrap puppet:
 
     * on the Puppetmaster (currently `pauli`), run the