docs(): Remove the link to non exist documentation

CONTRIBUTING.md

@@ -152,8 +152,7 @@ To ensure consistency throughout the source code, keep these rules in mind as yo
 // We're working on auto-documentation.
 * All public API methods **must be documented**. (Details TBC). -->
 * We follow [Google's JavaScript Style Guide][js-style-guide], but wrap all code at
-  **100 characters**. An automated formatter is available, see
-  [DEVELOPER.md](docs/DEVELOPER.md#clang-format).
+  **100 characters**. An automated formatter is available (`npm run format`).
 
 ## <a name="commit"></a> Commit Message Guidelines