refactor

extract/envi.go

@@ -50,20 +50,3 @@ func (h *EnviHdr) String() string {
 
 	return buf.String()
 }
-
-func NewBSQWriter(filepath string, content *EnviHdr) (*BSQWriter, error) {
-	fio, err := os.Create(filepath)
-	if err != nil {
-		return nil, err
-	}
-	w := fio
-	return &BSQWriter{filepath, fio, w, content}, nil
-}
-
-func (w *BSQWriter) Write(data []byte) (int, error) {
-	return w.w.Write(data)
-}
-
-func (w *BSQWriter) Close() error {
-	return w.fio.Close()
-}