chore: Remove old react-aria-components docs

[devongovett]

The old docs are no longer built or deployed anywhere so we can remove them from the repo to avoid confusion.

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the S2 docs
• View the React Aria docs

[snowystinger]

Missing some references that should be deleted as well
https://github.com/adobe/react-spectrum/blob/main/package.json#L41 <- can't tell if this should be removed, maybe with the new hooks docs?

react-spectrum/scripts/testDocs.js

Line 68 in d92d4b2

'packages/react-aria-components/docs/**/*.mdx',

react-spectrum/scripts/testDocs.js

Line 72 in d92d4b2

const rootPages = 'packages/dev/docs/pages/**/*.mdx';

I think this is now a defunct script https://github.com/adobe/react-spectrum/blob/main/scripts/createFeed.mjs