Remove broken link for API interface

Author: benrolfe

docs/Api/Index.md

@@ -2,7 +2,6 @@ API Index
 =========
 
 * [Action](Action.md)
-* [ApiInterface](ApiInterface.md)
 * [Board](Board.md)
     * [Actions](Board/Actions.md)
     * [Cardlists](Board/Cardlists.md)
@@ -44,4 +43,4 @@ API Index
 * [Organization](Organization.md)
 * [Token](Token.md)
     * [Webhooks](Token/Webhooks.md)
-* [Webhook](Webhook.md)
+* [Webhook](Webhook.md)