Remove `IDisposable`/`AutoCloseable` if not necessary

[emgre]

Some classes do not depend on the runtime or do not need an explicit destruction/shutdown. A great example for this is the Request object in DNP3 master. For these classes, we want to be able to remove the closeable implementation by a flag in the schema. This would remove the using statements to appease the linters.

In C#, it would remove the IDisposable implementation. In Java, it would remove the AutoCloseable implementation. The finalizer would still properly delete the object, of course.