gotd: reduce unnecessary debug logs

pkg/gotd/mtproto/rpc.go

@@ -23,22 +23,14 @@ func (c *Conn) Invoke(ctx context.Context, input bin.Encoder, output bin.Decoder
 		Output: output,
 	}
 
-	log := c.log.With(
-		zap.Int64("msg_id", req.MsgID),
-	)
-	log.Debug("Invoke start")
-	defer log.Debug("Invoke end")
-
 	if err := c.rpc.Do(ctx, req); err != nil {
 		var badMsgErr *badMessageError
 		if errors.As(err, &badMsgErr) && badMsgErr.Code == codeIncorrectServerSalt {
-			// Should retry with new salt.
-			c.log.Debug("Setting server salt")
 			// Store salt from server.
 			c.storeSalt(badMsgErr.NewSalt)
 			// Reset saved salts to fetch new.
 			c.salts.Reset()
-			c.log.Info("Retrying request after basMsgErr", zap.Int64("msg_id", req.MsgID))
+			c.log.Info("Retrying request after updating salt from badMsgErr", zap.Int64("msg_id", req.MsgID))
 			return c.rpc.Do(ctx, req)
 		}
 		return err