Drop platformatic cloud reference in serverless.md (fastify#5982)

We pivoted away from this.

Signed-off-by: Matteo Collina <hello@matteocollina.com>

Author: mcollina

docs/Guides/Serverless.md

@@ -29,7 +29,6 @@ snippet of code.
 - [Google Firebase Functions](#google-firebase-functions)
 - [Google Cloud Run](#google-cloud-run)
 - [Netlify Lambda](#netlify-lambda)
-- [Platformatic Cloud](#platformatic-cloud)
 - [Vercel](#vercel)
 
 ## AWS
@@ -562,49 +561,7 @@ Add this command to your `package.json` *scripts*
 }
 ```
 
-Then it should work fine
-
-## Platformatic Cloud
-
-[Platformatic](https://platformatic.dev) provides zero-configuration deployment
-for Node.js applications.
-To use it now, you should wrap your existing Fastify application inside a
-[Platformatic Service](https://oss.platformatic.dev/docs/reference/service/introduction),
-by running the following:
-
-
-```bash
-npm create platformatic@latest -- service
-```
-
-The wizard would ask you to fill in a few answers:
-
-```
-? Where would you like to create your project? .
-? Do you want to run npm install? yes
-? Do you want to use TypeScript? no
-? What port do you want to use? 3042
-[13:04:14] INFO: Configuration file platformatic.service.json successfully created.
-[13:04:14] INFO: Environment file .env successfully created.
-[13:04:14] INFO: Plugins folder "plugins" successfully created.
-[13:04:14] INFO: Routes folder "routes" successfully created.
-? Do you want to create the github action to deploy this application to Platformatic Cloud dynamic workspace? no
-? Do you want to create the github action to deploy this application to Platformatic Cloud static workspace? no
-```
-
-Then, head to [Platformatic Cloud](https://platformatic.cloud) and sign in
-with your GitHub account.
-Create your first application and a static workspace: be careful to download the
-API key as an env file, e.g. `yourworkspace.txt`.
-
-Then, you can easily deploy your application with the following command:
-
-```bash
-platformatic deploy --keys `yourworkspace.txt`
-```
-
-Check out the [Full Guide](https://blog.platformatic.dev/how-to-migrate-a-fastify-app-to-platformatic-service)
-on how to wrap Fastify application in Platformatic.
+Then it should work fine.
 
 ## Vercel