Remove unused code

components/ws-daemon/nsinsider/main.go

@@ -750,28 +750,6 @@ func syscallOpenTree(dfd int, path string, flags uintptr) (fd uintptr, err error
 	return fd, nil
 }
 
-type attr struct {
-	attrSet     uint64
-	attrClr     uint64
-	propagation uint64
-	userNs      uint64
-}
-
-func syscallMountSetAttr(dfd int, path string, flags uint, attr *attr, size uint) (err error) {
-	var _p0 *byte
-
-	if _p0, err = unix.BytePtrFromString(path); err != nil {
-		return err
-	}
-
-	_, _, e := unix.Syscall6(uintptr(unix.SYS_MOUNT_SETATTR), uintptr(dfd), uintptr(unsafe.Pointer(_p0)),
-		uintptr(flags), uintptr(unsafe.Pointer(attr)), uintptr(size), 0)
-	if e != 0 {
-		return e
-	}
-	return
-}
-
 const (
 	// FlagOpenTreeClone: https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/mount.h#L62
 	flagOpenTreeClone = 1