Revert "ssh,tempfork/gliderlabs/ssh: replace github.com/tailscale/golang-x-crypto/ssh with golang.org/x/crypto/ssh"

This reverts commit 46fd4e58a2.

We don't want to include this in 1.80 yet, but can add it back post 1.80.

Updates #8593

Signed-off-by: Percy Wegmann <percy@tailscale.com>

tempfork/gliderlabs/ssh/util.go

@@ -5,7 +5,7 @@ import (
 	"crypto/rsa"
 	"encoding/binary"
 
-	"golang.org/x/crypto/ssh"
+	"github.com/tailscale/golang-x-crypto/ssh"
 )
 
 func generateSigner() (ssh.Signer, error) {