Update README.md

Author: jasonjoh

README.md

@@ -8,7 +8,6 @@ In this lab you will create an Angular single-page application, configured with
 
 - [Angular Microsoft Graph tutorial](https://docs.microsoft.com/graph/tutorials/angular)
 
-- [02-add-aad-auth](demos/02-add-aad-auth): Completed [Add Azure AD authentication](https://docs.microsoft.com/graph/tutorials/angular?tutorial-step=3)
 ## Completed sample
 
 If you just want the completed sample generated by following this lab, you can find it here.