revert(amazonq): Remove loading mynah ui from language server (#6331)

## Problem
we want to make feature/amazonqLSP mergable at all times, but it
currently has some demo mynah ui code

## Solution
remove the mynah ui code for now

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: jpinkney-aws

packages/amazonq/src/chat/activation.ts

@@ -12,7 +12,6 @@ import { registerInlineCompletion } from '../inline/completion'
 import { AmazonQLspAuth, notificationTypes, writeEncryptionInit } from './auth'
 import { AuthUtil } from 'aws-core-vscode/codewhisperer'
 import { ConnectionMetadata } from '@aws/language-server-runtimes/protocol'
-import { registerChat } from '../chat/activation'
 
 const localize = nls.loadMessageBundle()
 
@@ -87,7 +86,6 @@ export function startLanguageServer(extensionContext: vscode.ExtensionContext, s
     return client.onReady().then(async () => {
         await auth.init()
         registerInlineCompletion(client)
-        registerChat(client)
 
         // Request handler for when the server wants to know about the clients auth connnection
         client.onRequest<ConnectionMetadata, Error>(notificationTypes.getConnectionMetadata.method, () => {