refactored deprecated code

api/gateway/chain/client/client.go

@@ -63,9 +63,6 @@ func New(ctx context.Context, cfg Config, opts ...grpc.DialOption) (Client, erro
 		return nil, merrors.InvalidArgument("chain-gateway: address is required")
 	}
 
-	dialCtx, cancel := context.WithTimeout(ctx, cfg.DialTimeout)
-	defer cancel()
-
 	dialOpts := make([]grpc.DialOption, 0, len(opts)+1)
 	dialOpts = append(dialOpts, opts...)
 
@@ -75,7 +72,7 @@ func New(ctx context.Context, cfg Config, opts ...grpc.DialOption) (Client, erro
 		dialOpts = append(dialOpts, grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})))
 	}
 
-	conn, err := grpc.DialContext(dialCtx, cfg.Address, dialOpts...)
+	conn, err := grpc.NewClient(cfg.Address, dialOpts...)
 	if err != nil {
 		return nil, merrors.Internal(fmt.Sprintf("chain-gateway: dial %s: %s", cfg.Address, err.Error()))
 	}