remove unused file

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

message.go

@@ -1,37 +0,0 @@
-package proto
-
-type Message struct {
-	Data []byte
-}
-
-func (m *Message) MarshalJSON() ([]byte, error) {
-	return m.Data, nil
-}
-
-func (m *Message) UnmarshalJSON(data []byte) error {
-	m.Data = data
-	return nil
-}
-
-func (m *Message) ProtoMessage() {}
-
-func (m *Message) Reset() {
-	*m = Message{}
-}
-
-func (m *Message) String() string {
-	return string(m.Data)
-}
-
-func (m *Message) Marshal() ([]byte, error) {
-	return m.Data, nil
-}
-
-func (m *Message) Unmarshal(data []byte) error {
-	m.Data = data
-	return nil
-}
-
-func NewMessage(data []byte) *Message {
-	return &Message{data}
-}