Remove example

CONTRIBUTING.md

@@ -41,7 +41,6 @@ possible with your report. If you can, please include:
   * Class methods and properties (methods starting with a `@`)
   * Instance methods and properties
 * Avoid platform-dependent code:
-  * Use `require('fs-plus').getHomeDirectory()` to get the home directory.
   * Use `path.join()` to concatenate filenames.
   * Use `os.tmpdir()` rather than `/tmp` when you need to reference the
     temporary directory.