fix: Clean up linting warnings in GitHub Copilot files

- Remove unused imports in github-copilot-auth.ts
- Remove unused variable in github-copilot-device-flow.ts
- Add eslint-disable comment for any in test file

apps/x/packages/core/src/auth/github-copilot-auth.ts

@@ -7,7 +7,6 @@
 
 import container from '../di/container.js';
 import { IOAuthRepo } from './repo.js';
-import { OAuthTokens } from './types.js';
 import { getProviderConfig } from './providers.js';
 import * as deviceFlow from './github-copilot-device-flow.js';
 import * as oauthClient from './oauth-client.js';

apps/x/packages/core/src/auth/github-copilot-device-flow.ts

@@ -74,7 +74,6 @@ export async function pollForToken(
 ): Promise<OAuthTokens> {
   console.log('[GitHub Copilot] Polling for token...');
 
-  const startTime = Date.now();
   const pollingInterval = DEFAULT_POLLING_INTERVAL;
 
   while (Date.now() < expiresAt) {