Point to the guide's contributing section instead of CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,40 +1,4 @@
 # Contributing
 
-This document contains instructions on how to get this project up and running.
-For more information on the architecture, design, and goals of this project
-please checkout [`DESIGN.md`](DESIGN.md).
-
-## Prerequisites
-
-1. Rust Nightly. [Install Rust]. Once Rust is installed, run
-
-    ```
-    rustup default nightly
-    ```
-
-[install Rust]: https://www.rust-lang.org/en-US/install.html
-
-2. The tests for this project use Node. Make sure you have node >= 8 installed,
-   as that is when WebAssembly support was introduced. [Install Node].
-
-[Install Node]: https://nodejs.org/en/
-
-3. The tests for this project also use yarn, a package manager for Node. To install yarn, run:
-
-    ```
-    npm install yarn -g
-    ```
-
-   ... or follow other platform-specific instructions [here](https://yarnpkg.com/en/docs/install).
-
-   Once `yarn` is installed, run it in the top level directory:
-
-   ```
-   yarn
-   ```
-
-   Finally, you can run the tests with `cargo`:
-
-   ```
-   cargo test
-   ```
+See the ["Contributing" section of the `wasm-bindgen`
+guide](https://rustwasm.github.io/wasm-bindgen/contributing.html).

README.md

@@ -69,10 +69,11 @@ at your option.
 
 ## Contribution
 
-[See `CONTRIBUTING.md` for hacking!][contributing]
+**[See the "Contributing" section of the guide for information on
+hacking on `wasm-bindgen`!][contributing]**
 
 Unless you explicitly state otherwise, any contribution intentionally submitted
 for inclusion in this project by you, as defined in the Apache-2.0 license,
 shall be dual licensed as above, without any additional terms or conditions.
 
-[contributing]: (https://github.com/rustwasm/wasm-bindgen/blob/master/CONTRIBUTING.md)
+[contributing]: https://rustwasm.github.io/wasm-bindgen/contributing.html