Remove starter workflows from code examples

👋🏾 This PR removes starter workflows from code examples on the docs page (I think). The workflows are all visible when a user hits the Actions tab and starts a new workflow. But on the way we do a transformation for example `$default-branch` to whatever your default branch is. So they don't work too well.

Some of the other things in the actions org might work, although not sure they qualify as good examples for learning from.

data/variables/action_code_examples.yml

@@ -1,10 +1,3 @@
-- title: Starter workflows
-  description: Workflow files for helping people get started with GitHub Actions
-  languages: TypeScript
-  href: actions/starter-workflows
-  tags:
-    - official
-    - workflows
 - title: Example services
   description: Example workflows using service containers
   languages: JavaScript