Revert netlify edge middleware docs (#7698)

packages/integrations/netlify/README.md

@@ -115,63 +115,6 @@ Once you run `astro build` there will be a `dist/_redirects` file. Netlify will
 > **Note**
 > You can still include a `public/_redirects` file for manual redirects. Any redirects you specify in the redirects config are appended to the end of your own.
 
-### Edge Middleware with Astro middleware
-
-The `@astrojs/netlify/functions` adapter can automatically create an edge function that will act as "Edge Middleware", from an Astro middleware in your code base.
-
-This is an opt-in feature and the `build.excludeMiddleware` option needs to be set to `true`:
-
-```js
-// astro.config.mjs
-import { defineConfig } from 'astro/config';
-import netlify from '@astrojs/netlify/functions';
-export default defineConfig({
-  output: 'server',
-  adapter: netlify(),
-  build: {
-    excludeMiddleware: true,
-  },
-});
-```
-
-Optionally, you can create a file recognized by the adapter named `netlify-edge-middleware.(js|ts)` in the [`srcDir`](https://docs.astro.build/en/reference/configuration-reference/#srcdir) folder to create [`Astro.locals`](https://docs.astro.build/en/reference/api-reference/#astrolocals).
-
-Typings require the [`https://edge.netlify.com`](https://docs.netlify.com/edge-functions/api/#reference) types.
-
-> Netlify edge functions run in a Deno environment, so you would need to import types using URLs.
->
-> You can find more in the [Netlify documentation page](https://docs.netlify.com/edge-functions/api/#runtime-environment)
-
-```ts
-// src/netlify-edge-middleware.ts
-import type { Context } from 'https://edge.netlify.com';
-
-export default function ({ request, context }: { request: Request; context: Context }): object {
-  // do something with request and context
-  return {
-    title: "Spider-man's blog",
-  };
-}
-```
-
-The data returned by this function will be passed to Astro middleware.
-
-The function:
-
-- must export a **default** function;
-- must **return** an `object`;
-- accepts an object with a `request` and `context` as properties;
-- `request` is typed as [`Request`](https://developer.mozilla.org/en-US/docs/Web/API/Request);
-- `context` is typed as [`Context`](https://docs.netlify.com/edge-functions/api/#edge-function-types);
-
-#### Limitations and constraints
-
-When you opt-in to this feature, there are a few constraints to note:
-
-- The Edge middleware will always be the **first** function to receive the `Request` and the last function to receive `Response`. This is an architectural constraint that follows the [boundaries set by Netlify](https://docs.netlify.com/edge-functions/overview/#use-cases).
-- Only `request` and `context` may be used to produce an `Astro.locals` object. Operations like redirects, etc. should be delegated to Astro middleware.
-- `Astro.locals` **must be serializable**. Failing to do so will result in a **runtime error**. This means that you **cannot** store complex types like `Map`, `function`, `Set`, etc.
-
 ## Usage
 
 [Read the full deployment guide here.](https://docs.astro.build/en/guides/deploy/netlify/)