some improvements

pkg/store/marshal.go

@@ -2,29 +2,7 @@
 
 package store
 
-import (
-	"bytes"
-	"encoding/gob"
-)
-
 type Marshaler interface {
 	Marshal(v interface{}) ([]byte, error)
 	Unmarshal(data []byte, v interface{}) error
 }
-
-type gobMarshaler struct{}
-
-func NewGOB() Marshaler {
-	return gobMarshaler{}
-}
-
-func (gobMarshaler) Marshal(v interface{}) (b []byte, err error) {
-	buf := new(bytes.Buffer)
-	err = gob.NewEncoder(buf).Encode(v)
-	b = buf.Bytes()
-	return
-}
-
-func (gobMarshaler) Unmarshal(data []byte, v interface{}) error {
-	return gob.NewDecoder(bytes.NewBuffer(data)).Decode(v)
-}