Apollo Boost isn't a thing anymore

[heygrady]

redux-toolkit/docs/introduction/getting-started.md

Line 23 in de82d4d

We can't solve every use case, but in the spirit of [`create-react-app`](https://github.com/facebook/create-react-app) and [`apollo-boost`](https://www.apollographql.com/blog/announcement/frontend/zero-config-graphql-state-management/), we can try to provide some tools that abstract over the setup process and handle the most common use cases, as well as include some useful utilities that will let the user simplify their application code.

https://github.com/apollographql/apollo-client/blob/73a4797747b9d3f5d961c910ad1d88d716a0e631/docs/source/migrating/apollo-client-3-migration.mdx#apollo-boost

I just clicked the Apollo Boost link and ended up at a bit of a dead end. After clicking around some more I found that boost was more-or-less integrated directly into the Apollo client.

Not a big deal either way but it was striking to encounter out-of-date references on the "getting started" page for redux-toolkit.

https://github.com/apollographql/apollo-client/releases/tag/v3.0.0

[BREAKING] Removed apollo-boost since Apollo Client 3.0 provides a boost like getting started experience out of the box.
@hwillson in apollographql/apollo-client#5217

[markerikson]

Yeah, could you file a PR to remove that from the README and the "Getting Started" page?