message: [GRPC] Deny messages longer than 4MB
diff: @@ -69,10 +69,6 @@ iroha::expected::Result<int, std::string> ServerRunner::run() {
  builder.RegisterService(service.get());
  }
  - // in order to bypass built-it limitation of gRPC message size
  - builder.SetMaxReceiveMessageSize(INT_MAX);
  - builder.SetMaxSendMessageSize(INT_MAX);
  -
  // enable retry policy
  builder.AddChannelArgument(GRPC_ARG_ENABLE_RETRIES, 1);
  