How to customize state field

Is there anyway that I could configure state field ( such as valid, protocol) to become hidden without rebuilding the whole project?

There is no way to hide fields at the moment. You would have to modify code.

Do I need to create a new build for my version? Or could you help me where should I start?

You need to modify web app and compile minified version. All information should be available on the website and forum. Obviously you need to know JavaScript if you want to do it yourself.

I modified StateController.js but I cannot find the tool to minified it, where is the location/download the file?

Use search before asking any questions please.