Vanilla JS sample update (#115)

* [GTD][Code Sample] React SPA Code Sample Update (ADO-54223) (#50)

* react-spa-code-update

* remove-files

* update-vanillajs-app

* update-changes

* update-README

* update-README

* update-README

* update-config

* update-auth-config

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: OwenRichards1

README.md

@@ -4,10 +4,6 @@ This repo contains code used to directly support the product documentation for t
 
 ## Content
 
-This repo contains the following code to directly support the product docs:
-
-* Coming Soon!
-
 ## Resources
 
 - [Microsoft identity platform product documentation](https://docs.microsoft.com/azure/active-directory/develop/)