repository: remove decryptReadCloser

repository/decrypt_read_closer.go

@@ -1,36 +0,0 @@
-package repository
-
-import (
-	"io"
-
-	"github.com/restic/restic/crypto"
-)
-
-// decryptReadCloser couples an underlying reader with a DecryptReader and
-// implements io.ReadCloser. On Close(), both readers are closed.
-type decryptReadCloser struct {
-	r  io.ReadCloser
-	dr io.ReadCloser
-}
-
-func newDecryptReadCloser(key *crypto.Key, rd io.ReadCloser) (io.ReadCloser, error) {
-	dr, err := crypto.DecryptFrom(key, rd)
-	if err != nil {
-		return nil, err
-	}
-
-	return &decryptReadCloser{r: rd, dr: dr}, nil
-}
-
-func (dr *decryptReadCloser) Read(buf []byte) (int, error) {
-	return dr.dr.Read(buf)
-}
-
-func (dr *decryptReadCloser) Close() error {
-	err := dr.dr.Close()
-	if err != nil {
-		return err
-	}
-
-	return dr.r.Close()
-}