Update app registration instructions

Author: jasonjoh

tutorial/03-register-app.md

@@ -20,10 +20,6 @@ In this exercise, you will create a new Azure AD web application registration us
 
     ![A screenshot of the application ID of the new app registration](./images/aad-application-id.png)
 
-1. Select **Authentication** under **Manage**. Locate the **Implicit grant** section and enable **ID tokens**. Select **Save**.
-
-    ![A screenshot of the Implicit grant section](./images/aad-implicit-grant.png)
-
 1. Select **Certificates & secrets** under **Manage**. Select the **New client secret** button. Enter a value in **Description** and select one of the options for **Expires** and select **Add**.
 
     ![A screenshot of the Add a client secret dialog](./images/aad-new-client-secret.png)