message: docs(testing): Fix broken links and delete the old testing section
diff: - [Component patterns](#component-patterns)
  - [Adding the sx prop](#adding-the-sx-prop)
  - [Linting](#linting)
  - - [Testing](#testing)
  - [TypeScript support](#typescript-support)
  - [Additional resources](#additional-resources)
  5. [Writing documentation](#writing-documentation)
  @@ -131,16 +130,6 @@ npm run lint -- --fix
  **Protip:** `npm run lint -- --quiet` (or `npx eslint --quiet ...`) will suppress warnings so that you can focus on fixing errors.
  -### Testing
  -
  -We test our components with [Jest](https://facebook.github.io/jest/) and [react-test-renderer](https://reactjs.org/docs/test-renderer.html). You can run the tests locally with `npm test`. To run the tests as you work, run Jest in watch mode with:
  -
  -```sh
  -npm test -- --watch
  -```
  -
  -See [`src/__tests__/example.js`](src/__tests__/example.js) for examples of ways that we test our components.
  -
  ### TypeScript support
  Primer React is written in TypeScript. We include type definitions in our built artifacts. To check types, run the `type-check` test script:
  