lnwallet: remove old deprecated MessageSigner struct

lnwallet/signer.go

@@ -1,33 +0,0 @@
-package lnwallet
-
-import (
-	"fmt"
-
-	"github.com/roasbeef/btcd/btcec"
-	"github.com/roasbeef/btcd/chaincfg/chainhash"
-)
-
-// MessageSigner is used for creation the signatures using the node identity key.
-// By message we mean the whole range of data that might require our approve,
-// starting from node, channel, channel update announcements and ending by user
-// data.
-type MessageSigner struct {
-	identityKey *btcec.PrivateKey
-}
-
-// NewMessageSigner returns the new instance of message signer.
-func NewMessageSigner(key *btcec.PrivateKey) *MessageSigner {
-	return &MessageSigner{
-		identityKey: key,
-	}
-}
-
-// SignData sign the message with the node private key.
-func (s *MessageSigner) SignData(data []byte) (*btcec.Signature, error) {
-	sign, err := s.identityKey.Sign(chainhash.DoubleHashB(data))
-	if err != nil {
-		return nil, fmt.Errorf("can't sign the message: %v", err)
-	}
-
-	return sign, nil
-}