Delete double 'Config' section

CONTRIBUTING.md

@@ -279,17 +279,6 @@ $ docker run --rm -it -p 4000:4000 sendgrid/docs:latest
 
 Wait until you see `Server running... press ctrl-c to stop.` and browse to [http://localhost:4000](http://localhost:4000)
 
-<a name="config"></a>
-## Config
-
-The config is defined in `_config.yml`.
-
-The only config variables you should need to know about are <code>root</code>, which is the root from which all links are calculated, and the <code>folder_weights</code> hash, which specifies the order that the folders should be displayed in the nav tree. Higher weights mean higher display priority (higher in the tree). You can also specify icons for folders with the
-<code>folder_icons</code> hash.
-
-There's also a <code>version</code> number in the config.
-
-
 <a name="config"></a>
 ## Config
 
@@ -493,4 +482,4 @@ The best way I've found to solve this issue without too much overhead work:
 7. [Open a Pull Request](https://help.github.com/articles/using-pull-requests/)
     with a clear title and description against the `master` branch. All tests must be passing before we will review the PR.
 
-If you have any additional questions, please feel free to [email](mailto:dx@sendgrid.com) us or create an issue in this repo.
+If you have any additional questions, please feel free to [email](mailto:dx@sendgrid.com) us or create an issue in this repo.