Cleaner HTML

Ideally, scraped docs would have minimal HTML. However, several docs currently have classes and wrapper elements. There should be a check that can be run after docs are scraped that looks for elements with a `class` or other non-`id` attribute that isn’t referenced by a CSS selector, as well as non-semantic elements with no attributes that are not referenced in the CSS. Then, someone should go through all of the docs to find and eliminate the excess markup. This will most likely result in a decrease in the size of downloaded docs bundles.

- [ ] create linter
- [ ] lint & fix the docs (maybe only do this when updating a doc for other reasons)