Don't include Document if not needed

[cjimmy]

The codegen'd file included

import {Document} from '@contentful/rich-text-types'

even though none of my types needed it. In order to avoid TS errors without manual intervention (or a hack-y script to modify the file), I have to include the package @contentful/rich-text-types. Ideally, it would not automatically assume our schema includes RichText.

[agrumason]

I have noticed that too, would be great having types without unused import.

[mikelehen]

+1. This is causing eslint to fail on the file for our project due to the unused import.