Update README.md

Author: mediumTaj

README.md

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 Use this SDK to build Watson-powered applications in Unity.
 
-<details>
-  <summary>Table of Contents</summary>
-
-  * [Before you begin](#before-you-begin)
-  * [Getting the Watson SDK and adding it to Unity](#getting-the-watson-sdk-and-adding-it-to-unity)
-    * [Installing the SDK source into your Unity project](#installing-the-sdk-source-into-your-unity-project)
-  * [Discovery v2 only on CP4D](#discovery-v2-only-on-cp4d)
-  * [Configuring your service credentials](#configuring-your-service-credentials)
-  * [Authentication](#authentication)
-  * [Watson Services](#watson-services)
-  * [Authentication Tokens](#authentication-tokens)
-  * [Documentation](#documentation)
-  * [Questions](#questions)
-  * [Open Source @ IBM](#open-source--ibm)
-  * [License](#license)
-  * [Contributing](#contributing)
-
-</details>
-
 ## Announcements
 ### Updating endpoint URLs from watsonplatform.net
 Watson API endpoint URLs at watsonplatform.net are changing and will not work after 26 May 2021. Update your calls to use the newer endpoint URLs. For more information, see https://cloud.ibm.com/docs/watson?topic=watson-endpoint-change.
@@ -62,10 +43,6 @@ You can get the latest SDK release by clicking [here][latest_release_sdk]. **You
 ### Installing the SDK source into your Unity project
 Move the **`unity-sdk`** and **`unity-sdk-core`** directories into the **`Assets`** directory of your Unity project. _Optional: rename the SDK directory from `unity-sdk` to `Watson` and the Core directory from `unity-sdk-core` to `IBMSdkCore`_.
 
-## Discovery v2 only on CP4D
-
-Discovery v2 is only available on Cloud Pak for Data.
-
 ## Configuring your service credentials
 To create instances of Watson services and their credentials, follow the steps below.