Remove legacy Tina implementation from tina.io

[jamespohalloran]

Right now we have a dated pre-TinaCloud version of Tina on tina.io. It uses unsupported features like open-authoring, inline-editing, frontend github-backend, etc.

It will be easier to add the current version of Tina once we remove this dated implementation.

• Remove Tina packages and code
• remove tina from community page #1210
• Remove Tina packages from docs pages #1211
• Remove Tina packages from blog pages #1212
• Remove Tina packages from home page #1213
• Remove tina package from _app.js #1216
• Remove "Edit this page" buttons #1214
• Remove any Github-based environment variables #1215

[gitsstewart]

We'll time box this effort to 2 days. If it gets too hairy we can take a step back and re-visit how to do this.

[gitsstewart]

First person to work on this needs to document the approach here so that there is consistency. Also create a punchlist here.

[logan-anderson]

First person to work on this needs to document the approach here so that there is consistency. Also create a punchlist here.

@spbyrne removed tina from the community page in #1210. We can follow this approach for consistency.

[spbyrne]

I'm going to take on the homepage. I recall using a blocks renderer that I can dig up or recreate so it shouldn't be too hard.

[spbyrne]

I'm mainly stripping out inline components by taking something like <InlineTextarea name="subline" /> and replacing it with {data.subline}, plus removing the Tina form. The specifics will depend on the page, though.

[logan-anderson]

@spbyrne

👍 I am going to tackle the docs page. I also removed the gihhub data fetching in getDocsProps