archive: remove unused checksum function

pkgs/archive/archive.go

@@ -6,8 +6,6 @@ package archive
 import (
 	"bytes"
 	"compress/flate"
-	"crypto/sha256"
-	"encoding/hex"
 	"github.com/cavaliercoder/go-cpio"
 	"github.com/klauspost/pgzip"
 	"gitlab.com/postmarketOS/postmarketos-mkinitfs/pkgs/misc"
@@ -59,37 +57,6 @@ func (archive *Archive) Write(path string, mode os.FileMode) error {
 	return nil
 }
 
-func checksum(path string) (string, error) {
-	var sum string
-
-	buf := make([]byte, 64*1024)
-	sha256 := sha256.New()
-	fd, err := os.Open(path)
-	if err != nil {
-		log.Print("Unable to checksum: ", path)
-		return sum, err
-	}
-	defer fd.Close()
-
-	// Read file in chunks
-	for {
-		bytes, err := fd.Read(buf)
-		if bytes > 0 {
-			_, err := sha256.Write(buf[:bytes])
-			if err != nil {
-				log.Print("Unable to checksum: ", path)
-				return sum, err
-			}
-		}
-
-		if err == io.EOF {
-			break
-		}
-	}
-	sum = hex.EncodeToString(sha256.Sum(nil))
-	return sum, nil
-}
-
 func (archive *Archive) AddFile(file string, dest string) error {
 	if err := archive.addDir(filepath.Dir(dest)); err != nil {
 		return err