multi: fix linter warnings with updated linter

lnwire/musig2.go

@@ -26,7 +26,7 @@ func (m *Musig2Nonce) Record() tlv.Record {
 }
 
 // nonceTypeEncoder is a custom TLV encoder for the Musig2Nonce type.
-func nonceTypeEncoder(w io.Writer, val interface{}, buf *[8]byte) error {
+func nonceTypeEncoder(w io.Writer, val interface{}, _ *[8]byte) error {
 	if v, ok := val.(*Musig2Nonce); ok {
 		_, err := w.Write(v[:])
 		return err
@@ -36,7 +36,7 @@ func nonceTypeEncoder(w io.Writer, val interface{}, buf *[8]byte) error {
 }
 
 // nonceTypeDecoder is a custom TLV decoder for the Musig2Nonce record.
-func nonceTypeDecoder(r io.Reader, val interface{}, buf *[8]byte,
+func nonceTypeDecoder(r io.Reader, val interface{}, _ *[8]byte,
 	l uint64) error {
 
 	if v, ok := val.(*Musig2Nonce); ok {

lnwire/partial_sig.go

@@ -137,7 +137,7 @@ func (p *PartialSigWithNonce) Record() tlv.Record {
 // partialSigWithNonceTypeEncoder encodes 98-byte musig2 extended partial
 // signature as: s {32} || nonce {66}.
 func partialSigWithNonceTypeEncoder(w io.Writer, val interface{},
-	buf *[8]byte) error {
+	_ *[8]byte) error {
 
 	if v, ok := val.(*PartialSigWithNonce); ok {
 		sigBytes := v.Sig.Bytes()

lnwire/shutdown.go

@@ -29,7 +29,7 @@ func (s *ShutdownNonce) Record() tlv.Record {
 
 // shutdownNonceTypeEncoder is a custom TLV encoder for the Musig2Nonce type.
 func shutdownNonceTypeEncoder(w io.Writer, val interface{},
-	buf *[8]byte) error {
+	_ *[8]byte) error {
 
 	if v, ok := val.(*ShutdownNonce); ok {
 		_, err := w.Write(v[:])
@@ -40,7 +40,7 @@ func shutdownNonceTypeEncoder(w io.Writer, val interface{},
 }
 
 // shutdownNonceTypeDecoder is a custom TLV decoder for the Musig2Nonce record.
-func shutdownNonceTypeDecoder(r io.Reader, val interface{}, buf *[8]byte,
+func shutdownNonceTypeDecoder(r io.Reader, val interface{}, _ *[8]byte,
 	l uint64) error {
 
 	if v, ok := val.(*ShutdownNonce); ok {