Revert "AUTH-1941: Adds initial SSH server implementation"

This reverts commit e9c9bf3cbd.

vendor/github.com/creack/pty/pty_dragonfly.go

@@ -1,80 +0,0 @@
-package pty
-
-import (
-	"errors"
-	"os"
-	"strings"
-	"syscall"
-	"unsafe"
-)
-
-// same code as pty_darwin.go
-func open() (pty, tty *os.File, err error) {
-	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
-	if err != nil {
-		return nil, nil, err
-	}
-	// In case of error after this point, make sure we close the ptmx fd.
-	defer func() {
-		if err != nil {
-			_ = p.Close() // Best effort.
-		}
-	}()
-
-	sname, err := ptsname(p)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	if err := grantpt(p); err != nil {
-		return nil, nil, err
-	}
-
-	if err := unlockpt(p); err != nil {
-		return nil, nil, err
-	}
-
-	t, err := os.OpenFile(sname, os.O_RDWR, 0)
-	if err != nil {
-		return nil, nil, err
-	}
-	return p, t, nil
-}
-
-func grantpt(f *os.File) error {
-	_, err := isptmaster(f.Fd())
-	return err
-}
-
-func unlockpt(f *os.File) error {
-	_, err := isptmaster(f.Fd())
-	return err
-}
-
-func isptmaster(fd uintptr) (bool, error) {
-	err := ioctl(fd, syscall.TIOCISPTMASTER, 0)
-	return err == nil, err
-}
-
-var (
-	emptyFiodgnameArg fiodgnameArg
-	ioctl_FIODNAME    = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
-)
-
-func ptsname(f *os.File) (string, error) {
-	name := make([]byte, _C_SPECNAMELEN)
-	fa := fiodgnameArg{Name: (*byte)(unsafe.Pointer(&name[0])), Len: _C_SPECNAMELEN, Pad_cgo_0: [4]byte{0, 0, 0, 0}}
-
-	err := ioctl(f.Fd(), ioctl_FIODNAME, uintptr(unsafe.Pointer(&fa)))
-	if err != nil {
-		return "", err
-	}
-
-	for i, c := range name {
-		if c == 0 {
-			s := "/dev/" + string(name[:i])
-			return strings.Replace(s, "ptm", "pts", -1), nil
-		}
-	}
-	return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
-}