Chore: remove references to parser demo #12644
What is the purpose of this pull request? (put an "X" next to item)
[X] Documentation update
In addition to the documentation update, this PR also removes the bundling of espree, since it's only used for the parser demo.
What changes did you make? (Give an overview)
We should probably land the eslint/website PR first, but since we're a ways out from our next release we should be okay as long as we can follow up with merging this shortly after.
Is there anything you'd like reviewers to focus on?