remove unnecessary assign

proxy/vmess/encoding/server.go

@@ -92,14 +92,14 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 
 	switch buffer[40] {
 	case AddrTypeIPv4:
-		nBytes, err = io.ReadFull(decryptor, buffer[41:45]) // 4 bytes
+		_, err = io.ReadFull(decryptor, buffer[41:45]) // 4 bytes
 		bufferLen += 4
 		if err != nil {
 			return nil, errors.New("VMess|Server: Failed to read IPv4: " + err.Error())
 		}
 		request.Address = v2net.IPAddress(buffer[41:45])
 	case AddrTypeIPv6:
-		nBytes, err = io.ReadFull(decryptor, buffer[41:57]) // 16 bytes
+		_, err = io.ReadFull(decryptor, buffer[41:57]) // 16 bytes
 		bufferLen += 16
 		if err != nil {
 			return nil, errors.New("VMess|Server: Failed to read IPv6 address: " + err.Error())
@@ -114,7 +114,7 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 		if domainLength == 0 {
 			return nil, errors.New("VMess|Server: Zero domain length.")
 		}
-		nBytes, err = io.ReadFull(decryptor, buffer[42:42+domainLength])
+		_, err = io.ReadFull(decryptor, buffer[42:42+domainLength])
 		if err != nil {
 			return nil, errors.New("VMess|Server: Failed to read domain: " + err.Error())
 		}
@@ -122,7 +122,7 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 		request.Address = v2net.DomainAddress(string(buffer[42 : 42+domainLength]))
 	}
 
-	nBytes, err = io.ReadFull(decryptor, buffer[bufferLen:bufferLen+4])
+	_, err = io.ReadFull(decryptor, buffer[bufferLen:bufferLen+4])
 	if err != nil {
 		return nil, errors.New("VMess|Server: Failed to read checksum: " + err.Error())
 	}