Remove files from old Gatsby docs theme (v2) (#6216)

* Remove files from old Gatsby docs theme

* Remove v2 docs static/_redirects

* Remove netlify.toml

* Update README.md

docs/README.md

@@ -4,26 +4,6 @@ This is the documentation **source** for this repository.
 
 The **deployed** version of the documentation for this repository is available at:
 
-* https://www.apollographql.com/docs/apollo-server/
+* https://www.apollographql.com/docs/apollo-server/v2
 
-## Documentation for the documentation
-
-This `README.md` is intentionally short since the [documentation for the documentation](https://docs-docs.netlify.com/docs/docs/) provides details for the documentation framework _itself_. Additional information should generally be added to that documentation rather than here in this `README.md`, in order to provide a centralized resource that benefits all documentation deployments.
-
-## Running locally
-
-For more information, consult the documentation for the documentation, referenced above.
-
-In general though:
-
-* `npm install` in this directory
-* `npm start` in this directory
-* Open a browser to the link provided in the console.
-
-> **Important note:** Changes to the markdown source does not result in an automatic "hot reload" in the browser; it is necessary to reload the page manually in the browser to see it re-rendered. Additionally, changes to `_config.yml` require stopping the server and restarting with `npm start` again.
-
-## Deploy previews
-
-Documentation repositories should be setup with a "deploy preview" feature which automatically provides "preview" links in the _status checks_ section of pull-requests.
-
-In the event that it's not possible to run the documentation locally, pushing changes to the branch for a pull-request can be a suitable alternative that ensures changes to the documentation are properly rendered.
+See the [docs site README](https://github.com/apollographql/docs) for local installation and development.