Clean up obsolete docs (#5068)

* Update Getting started on Welcome page

The sections referenced in the Getting Started seem no longer to exist, and included a broken link.

* Remove broken link from README

The Quick links section included a link to a README for the component-library package. This package does not currently have a README, so this link was broken.

.changeset/real-shoes-relate.md

@@ -0,0 +1,2 @@
+---
+---

README.md

@@ -12,7 +12,6 @@ This document serves to orient you within the repository — to get you set up a
 
 - [Kaizen Issues](https://github.com/cultureamp/kaizen-discourse/issues)
 - [Kaizen Design Tokens README](./packages/design-tokens/README.md)
-- [Kaizen Component Library README](./packages/component-library/README.md)
 - [Contributing guidelines](./CONTRIBUTING.md)
 
 ## Designers

docs/pages/welcome.mdx

@@ -12,13 +12,6 @@ To achieve this, Kaizen provides a set of React components and tokens which repr
 
 You can find a comprehensive overview of how to get your code base started on our [Github page](https://github.com/cultureamp/kaizen-design-system#getting-started).
 
-We have 4 main sections:
-- Components: React components you can use in your Apps
-- Helpers: Any hooks or utilities we provide
-- Design tokens: Primarily used for creating new components that don't already exist.
-- Deprecated: components which are on their way out. (Find out more on the [Component Health page](https://cultureamp.design/component-health/))
-
-
 ## Support
 
 The Kaizen Design System Team is here to support the usage of the library via #prod_design_system channel on Slack.