refactored deprecated code

api/gateway/mntx/client/client.go

@@ -45,14 +45,11 @@ func New(ctx context.Context, cfg Config, opts ...grpc.DialOption) (Client, erro
 	if strings.TrimSpace(cfg.Address) == "" {
 		return nil, merrors.InvalidArgument("mntx: address is required")
 	}
-	dialCtx, cancel := context.WithTimeout(ctx, cfg.DialTimeout)
-	defer cancel()
-
 	dialOpts := make([]grpc.DialOption, 0, len(opts)+1)
 	dialOpts = append(dialOpts, grpc.WithTransportCredentials(insecure.NewCredentials()))
 	dialOpts = append(dialOpts, opts...)
 
-	conn, err := grpc.DialContext(dialCtx, cfg.Address, dialOpts...)
+	conn, err := grpc.NewClient(cfg.Address, dialOpts...)
 	if err != nil {
 		return nil, merrors.Internal("mntx: dial failed: " + err.Error())
 	}