[Examples] Remove with-universal-configuration-runtime (#15268)

examples/with-universal-configuration-runtime/README.md

@@ -1,38 +1,4 @@
-# With universal runtime configuration
+Next.js automatically supports Environment Variable loading as of Next.js 9.4.
+You can [read more about it in the blog post](https://nextjs.org/blog/next-9-4#new-environment-variables-support).
 
-This example show how to set custom environment variables for your application at runtime using the `publicRuntimeConfig` key in `next.config.js`
-
-For documentation see: https://github.com/vercel/next.js#exposing-configuration-to-the-server--client-side
-
-## How to use
-
-### Using `create-next-app`
-
-Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:
-
-```bash
-npx create-next-app --example with-universal-configuration-runtime with-universal-configuration-runtime-app
-# or
-yarn create next-app --example with-universal-configuration-runtime with-universal-configuration-runtime-app
-```
-
-### Download manually
-
-Download the example:
-
-```bash
-curl https://codeload.github.com/vercel/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-universal-configuration-runtime
-cd with-universal-configuration-runtime
-```
-
-Install it and run:
-
-```bash
-npm install
-API_URL='https://example.com' npm run dev
-# or
-yarn
-API_URL='https://example.com' yarn dev
-```
-
-Deploy it to the cloud with [Vercel](https://vercel.com/import?filter=next.js&utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).
+Visit [the documentation](https://nextjs.org/docs/basic-features/environment-variables) to learn how to use Environment Variables support in Next.js 9.4+ and the [Environment Variables Example](/examples/environment-variables) to see it on action.