Remove unused fields

Signed-off-by: NMark Hymers <mhy@debian.org>

docs/README.config

@@ -191,15 +191,10 @@ Mandatory.  List of dinstall options, e.g.:
 
 | Dinstall
 | {
-|    GPGKeyring {
-|       "/org/keyring.debian.org/keyrings/debian-keyring.gpg";
-|       "/org/keyring.debian.org/keyrings/debian-keyring.pgp";
-|    };
 |    SigningKeyring "/org/ftp.debian.org/s3kr1t/dot-gnupg/secring.gpg";
 |    SendmailCommand "/usr/sbin/sendmail -odq -oi -t";
 |    MyEmailAddress "Debian Installer <installer@ftp-master.debian.org>";
 |    MyAdminAddress "ftpmaster@debian.org";
-|    MyHost "debian.org";  // used for generating user@my_host addresses in e.g. manual_reject()
 |    MyDistribution "Debian";
 |    BugServer "bugs.debian.org";
 |    PackagesServer "packages.debian.org";
@@ -211,9 +206,6 @@ Mandatory.  List of dinstall options, e.g.:
 |    BXANotify "false";
 | };
 
-GPGKeyring (required): filenames of the PGP and GnuPG
-keyrings to be used by dak.
-
 SigningKeyring (optional): this is the private keyring used by 'dak
 generate-releases'.