ref(js): initializeApp is not async (#35292)

static/app/bootstrap/initializeApp.tsx

@@ -11,7 +11,7 @@ import {processInitQueue} from './processInitQueue';
 import {renderMain} from './renderMain';
 import {renderOnDomReady} from './renderOnDomReady';
 
-export async function initializeApp(config: Config) {
+export function initializeApp(config: Config) {
   commonInitialization(config);
   initializeSdk(config, {routes});
 

static/app/bootstrap/initializeMain.tsx

@@ -12,5 +12,5 @@ export async function initializeMain(config: Config) {
   // This is dynamically imported because we need to make sure locale is configured
   // before proceeding.
   const {initializeApp} = await import('./initializeApp');
-  await initializeApp(config);
+  initializeApp(config);
 }