osutil: remove Ftruncate

`*os.File` has `Truncate()`

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

pkg/nativeimgutil/nativeimgutil.go

@@ -14,7 +14,6 @@ import (
 	"github.com/lima-vm/go-qcow2reader"
 	"github.com/lima-vm/go-qcow2reader/image/qcow2"
 	"github.com/lima-vm/go-qcow2reader/image/raw"
-	"github.com/lima-vm/lima/pkg/osutil"
 	"github.com/lima-vm/lima/pkg/progressbar"
 	"github.com/sirupsen/logrus"
 )
@@ -169,5 +168,5 @@ func MakeSparse(f *os.File, n int64) error {
 	if _, err := f.Seek(n, io.SeekStart); err != nil {
 		return err
 	}
-	return osutil.Ftruncate(int(f.Fd()), n)
+	return f.Truncate(n)
 }

pkg/osutil/osutil_unix.go

@@ -13,10 +13,6 @@ func Dup2(oldfd, newfd int) (err error) {
 	return unix.Dup2(oldfd, newfd)
 }
 
-func Ftruncate(fd int, length int64) (err error) {
-	return unix.Ftruncate(fd, length)
-}
-
 func SignalName(sig os.Signal) string {
 	return unix.SignalName(sig.(syscall.Signal))
 }

pkg/osutil/osutil_windows.go

@@ -38,10 +38,6 @@ func Dup2(oldfd int, newfd syscall.Handle) (err error) {
 	return fmt.Errorf("unimplemented")
 }
 
-func Ftruncate(_ int, _ int64) (err error) {
-	return fmt.Errorf("unimplemented")
-}
-
 func SignalName(sig os.Signal) string {
 	switch sig {
 	case syscall.SIGINT: