docs(astro): Remove typescript declaration step

docs/quickstarts/astro.mdx

@@ -105,19 +105,6 @@ description: Add authentication and user management to your Astro app with Clerk
      ```
   1. By default, `clerkMiddleware()` will not protect any routes. All routes are public and you must opt-in to protection for routes. See the [`clerkMiddleware()` reference](/docs/references/astro/clerk-middleware) to learn how to require authentication for specific routes.
 
-  ## Add TypeScript declarations
-
-  Update the `env.d.ts` file in your `src/` directory to add type definitions for the `locals` added by the middleware.
-
-  ```ts {{ prettier: false, filename: 'src/env.d.ts', mark: [3] }}
-  // The line directly below will only be present if you've ran your app
-  // Don't worry about adding it manually
-  /// <reference path="../.astro/types.d.ts" />
-
-  /// <reference types="astro/client" />
-  /// <reference types="@clerk/astro/env" />
-  ```
-
   ## Add Clerk components to your app
 
   You can control which content signed-in and signed-out users can see with Clerk's [prebuilt control components](/docs/components/overview#what-are-control-components). Create a header using the following components: