pkg/archive/diff.go: avoid redundant options init
@@ -41,9 +41,6 @@ func UnpackLayer(dest string, layer io.Reader, options *TarOptions) (size int64,
aufsTempdir := ""
aufsHardlinks := make(map[string]*tar.Header)
- if options == nil {
- options = &TarOptions{}
- }
// Iterate through the files in the archive.
for {
hdr, err := tr.Next()
