Update README Table of Contents.

Author: BigBlueHat

README.md

@@ -21,7 +21,6 @@ specification.
   - [Testing Locally](#testing-locally)
   - [Allure Reporting](#allure-reporting)
 - [Implementation](#implementation)
-  - [VC-API](#vc-api)
   - [Enveloping Proof](#enveloping-proof)
 - [Contribute](#contribute)
 - [License](#license)