remove unused code

internal/backend/local/local.go

@@ -25,25 +25,6 @@ var _ restic.Backend = &Local{}
 
 const defaultLayout = "default"
 
-// dirExists returns true if the name exists and is a directory.
-func dirExists(name string) bool {
-	f, err := fs.Open(name)
-	if err != nil {
-		return false
-	}
-
-	fi, err := f.Stat()
-	if err != nil {
-		return false
-	}
-
-	if err = f.Close(); err != nil {
-		return false
-	}
-
-	return fi.IsDir()
-}
-
 // Open opens the local backend as specified by config.
 func Open(cfg Config) (*Local, error) {
 	debug.Log("open local backend at %v (layout %q)", cfg.Path, cfg.Layout)

internal/backend/s3/s3.go

@@ -231,22 +231,6 @@ func (be *Backend) Path() string {
 	return be.cfg.Prefix
 }
 
-// lenForFile returns the length of the file.
-func lenForFile(f *os.File) (int64, error) {
-	fi, err := f.Stat()
-	if err != nil {
-		return 0, errors.Wrap(err, "Stat")
-	}
-
-	pos, err := f.Seek(0, io.SeekCurrent)
-	if err != nil {
-		return 0, errors.Wrap(err, "Seek")
-	}
-
-	size := fi.Size() - pos
-	return size, nil
-}
-
 // Save stores data in the backend at the handle.
 func (be *Backend) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
 	debug.Log("Save %v", h)

internal/backend/swift/swift.go

@@ -17,8 +17,6 @@ import (
 	"github.com/ncw/swift"
 )
 
-const connLimit = 10
-
 // beSwift is a backend which stores the data on a swift endpoint.
 type beSwift struct {
 	conn      *swift.Connection