Fix/ppdsc 2113 prodtealium not being served

[Vanals]

PPDSC-2113

What

We were trying to access to productionSiteEnv through this.props. this.props.productionSiteEnv is undefined.

None of the props created at getStatiprops level were defined. The production prop, wasn't even used anywhere.
I have so cleaned the props, removing production and productionSiteEnv, then questioned the rest of the function. If renderPage is needed or if getStaticProps is needed at all.

I am then accessing the values, directly from process without passing them as a prop(which wasn't happening anyway). Time ago when we were using getInitialProps the props were working, but we moved away from it for fixing an issue with HeadNext.

Removing the whole function

I could not find in the documentation any guidance around renderPage(), that could fit us, I could not find any guidance around why we should use getStaticProps in the _document. Instead, getStaticProps, is stated, is not supported in _document AND when building the page, after removing all of it, the website seems working fine.

https://nextjs.org/docs/advanced-features/custom-document

Document currently does not support Next.js [Data Fetching methods](https://nextjs.org/docs/basic-features/data-fetching/overview) like [getStaticProps](https://nextjs.org/docs/basic-features/data-fetching/get-static-props) or [getServerSideProps](https://nextjs.org/docs/basic-features/data-fetching/get-server-side-props).

renderPage

I have done:

• Written unit tests against changes
• Written functional tests against the component and/or NewsKit site
• Updated relevant documentation

I have tested manually:

• The feature's functionality is working as expected on Chrome, Firefox, Safari and Edge
• The screen reader reads and flows through the elements as expected.
• There are no new errors in the browser console coming from this PR.
• When visual test is not added, it renders correctly on different browsers and mobile viewports (Safari, Firefox, small mobile viewport, tablet)
• The Playground feature is working as expected

Before:

After:

Who should review this PR:

How to test:

[newskit-engineering]

You can preview these changes on:
Documentation Site: http://ncu-newskit-docs.s3-website-eu-west-1.amazonaws.com/ppdsc-2113-prodtealium-not-being-served
Storybook: http://ncu-newskit-docs.s3-website-eu-west-1.amazonaws.com/ppdsc-2113-prodtealium-not-being-served/storybook

[mutebg]

thanks for explanation, seems good to me