remove CONTRIBUTING.md and references (#20305)

* remove CONTRIBUTING.md and references

Author: taroface

CONTRIBUTING.md

@@ -6,11 +6,6 @@ This repository contains the source files for the CockroachDB documentation avai
 
 Want a topic added to the docs? Need additional details or clarification? See an error or other problem? Please [open an issue](https://github.com/cockroachdb/docs/issues).
 
-## Write Docs
-
-Want to contribute to the docs? See [CONTRIBUTING](CONTRIBUTING.md) for details about setting yourself up and getting started.
-
 ## Resources
 
-- [Code of conduct](CODE_OF_CONDUCT.md)
-- [Contributing](CONTRIBUTING.md)
+- [Code of conduct](CODE_OF_CONDUCT.md)

README.md

@@ -213,7 +213,7 @@ CockroachDB docs are mainly comprised of pages (`.md`) and images (`.png` or `.g
 - `this-is-a-doc.md`
 - `name-of-your-image.png`
 
-Each version's pages are found in a directory named for the version. For example, pages for CockroachDB v21.1 are in the `docs > v21.1` directory. For more information about page structure, see the [Pages](https://github.com/cockroachdb/docs/blob/main/CONTRIBUTING.md#pages) section in our [Contributing Guide](https://github.com/cockroachdb/docs/blob/main/CONTRIBUTING.md). For more information about how to style page content, see [Components](#components).
+Each version's pages are found in a directory named for the version. For example, pages for CockroachDB v21.1 are in the `docs > src > current > v21.1` directory. For more information about how to style page content, see [Components](#components).
 
 Each version's images are stored in a versioned directory under the `images` directory. For example, images for CockroachDB v21.1 are in the `docs > images > v21.1` directory. For more information, see [Images](#images).