docs: Remove experimental warning

docs/source/index.mdx

@@ -8,8 +8,6 @@ import { Button } from '@apollo/space-kit/Button';
 import { Link } from 'gatsby';
 import { colors } from 'gatsby-theme-apollo-core';
 
-> ⚠️ **The Apollo Router is in public pre-alpha.** Until it is generally available, do not use it in business-critical graphs. [Learn about release stages.](https://www.apollographql.com/docs/resources/release-stages/#open-source-release-stages)
-
 The **Apollo Router** is a configurable, high-performance **graph router** for a federated graph. It slots into any existing [Apollo Federation](https://www.apollographql.com/docs/federation/) architecture (v1 or v2), replacing your Node.js gateway that uses the `@apollo/gateway` library:
 
 ```mermaid