refactor(infra): remove old plugin system (#5411)

plugin system need redesign

packages/frontend/core/src/index.tsx

@@ -1,14 +1,11 @@
-import 'ses';
 import './polyfill/intl-segmenter';
 import './polyfill/request-idle-callback';
 
 import { assertExists } from '@blocksuite/global/utils';
-import { getCurrentStore } from '@toeverything/infra/atom';
 import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
 
 import { App } from './app';
-import { bootstrapPluginSystem } from './bootstrap/register-plugins';
 import { setup } from './bootstrap/setup';
 import { performanceLogger } from './shared';
 
@@ -18,14 +15,9 @@ function main() {
 
   // skip bootstrap setup for desktop onboarding
   if (window.appInfo?.windowName !== 'onboarding') {
-    const rootStore = getCurrentStore();
     performanceMainLogger.info('setup start');
     setup();
     performanceMainLogger.info('setup done');
-
-    bootstrapPluginSystem(rootStore).catch(err => {
-      console.error('Failed to bootstrap plugin system', err);
-    });
   }
 
   mountApp();