[1/3] ssh/readconf.c: Remove SSH1 options in example

[Martin]

Hey!

This diff removes unsupported SSH1 options from the format example
comment.

Best,

Martin

P.S.: This is the first of 3 diffs, I did them with git this time I hope they
are in the correct format.

diff --git readconf.c readconf.c
index 44464bed71e..eff2d5d1672 100644
--- readconf.c
+++ readconf.c
@@ -107,8 +107,6 @@
      ForwardAgent no
      ForwardX11 no
      PasswordAuthentication yes
-     RSAAuthentication yes
-     RhostsRSAAuthentication yes
      StrictHostKeyChecking yes
      TcpKeepAlive no
      IdentityFile ~/.ssh/identity