fix(runtime): don't flag html tag with hydrate flag anymore (#6103)

* fix(runtime): don't flag html tag with hydrate flag anymore

* fix linter

* remove unit test

* fix unit test

Author: christian-bromann

src/runtime/test/hydrated.spec.tsx

@@ -111,7 +111,6 @@ describe('lifecycle async', () => {
     @Component({ tag: 'cmp-a' })
     class CmpA {
       componentWillLoad() {
-        expect(document.documentElement.classList.contains('hydrated')).toBe(false);
         window.addEventListener('appload', (ev: CustomEvent) => mockEvent(ev.detail));
       }
 
@@ -125,7 +124,6 @@ describe('lifecycle async', () => {
       includeAnnotations: true,
     });
 
-    expect(document.documentElement.classList.contains('hydrated')).toBe(true);
     expect(mockEvent).toHaveBeenCalledTimes(1);
     expect(mockEvent).toHaveBeenCalledWith({
       namespace: 'app',

src/runtime/test/lifecycle-async.spec.tsx

@@ -1,5 +1,5 @@
 import { BUILD, NAMESPACE } from '@app-data';
-import { Build, consoleError, doc, getHostRef, nextTick, plt, win, writeTask } from '@platform';
+import { Build, consoleError, getHostRef, nextTick, plt, win, writeTask } from '@platform';
 import { CMP_FLAGS, HOST_FLAGS } from '@utils';
 
 import type * as d from '../declarations';
@@ -415,11 +415,6 @@ export const forceUpdate = (ref: any) => {
 };
 
 export const appDidLoad = (who: string) => {
-  // on appload
-  // we have finish the first big initial render
-  if (BUILD.cssAnnotations) {
-    addHydratedFlag(doc.documentElement);
-  }
   if (BUILD.asyncQueue) {
     plt.$flags$ |= PLATFORM_FLAGS.appLoaded;
   }