Removed old v3 and v4 docs

website/docs/using-unleash/deploy/getting-started.md

@@ -26,7 +26,7 @@ Unleash started on http://localhost:4242
 
 To run multiple replicas of Unleash simply point all instances to the same database.
 
-**Unleash v4:** The first time Unleash starts it will create a default user which you can use to sign-in to you Unleash instance and add more users with:
+The first time Unleash starts it will create a default user which you can use to sign-in to you Unleash instance and add more users with:
 
 - username: `admin`
 - password: `unleash4all`

website/docs/using-unleash/deploy/google-auth-hook.md

@@ -6,8 +6,6 @@ title: Google Auth Hook
 
 This part of the tutorial shows how to create a sign-in flow for users and integrate with Unleash server project. The implementation assumes that I am working in `localhost` with `4242` port.
 
-**If you are still using Unleash v3 you need to follow the [google-auth-hook-v3](google-auth-v3)**
-
 This is a simple `index.ts` server file.
 
 ```javascript

website/docs/using-unleash/deploy/securing-unleash.md

@@ -2,8 +2,6 @@
 title: Securing Unleash
 ---
 
-**If you are still using Unleash v3 you need to follow the [securing-unleash-v3](./securing-unleash-v3)**
-
 > This guide is only relevant if you are using Unleash Open-Source. The Enterprise edition does already ship with multiple SSO options, such as SAML 2.0, OpenID Connect.
 
 Unleash Open-Source v4 comes with username/password authentication out of the box. In addition Unleash v4 also comes with API token support, to make it easy to handle access tokens for Client SDKs and programmatic access to the Unleash APIs.