Remove support for SSH1 as it is already disabled in our OpenSSH.

Submitted by:	vangyzen
MFC after:	2 weeks

lib/libpam/modules/pam_ssh/pam_ssh.8

@@ -128,9 +128,7 @@ Start an agent even if no keys were decrypted during the
 authentication phase.
 .El
 .Sh FILES
-.Bl -tag -width ".Pa $HOME/.ssh/identity" -compact
-.It Pa $HOME/.ssh/identity
-SSH1 RSA key
+.Bl -tag -width ".Pa $HOME/.ssh/id_ed25519" -compact
 .It Pa $HOME/.ssh/id_rsa
 SSH2 RSA key
 .It Pa $HOME/.ssh/id_dsa

lib/libpam/modules/pam_ssh/pam_ssh.c

@@ -77,7 +77,6 @@ static const char *pam_ssh_prompt = "SSH passphrase: ";
 static const char *pam_ssh_have_keys = "pam_ssh_have_keys";
 
 static const char *pam_ssh_keyfiles[] = {
-	".ssh/identity",	/* SSH1 RSA key */
 	".ssh/id_rsa",		/* SSH2 RSA key */
 	".ssh/id_dsa",		/* SSH2 DSA key */
 	".ssh/id_ecdsa",	/* SSH2 ECDSA key */