[8.10] [Flaky #70928] Unskip test (#166177) (#166324)

# Backport

This will backport the following commits from `main` to `8.10`:
- [[Flaky #70928] Unskip test
(#166177)](#166177)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Alejandro Fernández
Haro","email":"alejandro.haro@elastic.co"},"sourceCommit":{"committedDate":"2023-09-13T07:06:05Z","message":"[Flaky
#70928] Unskip test
(#166177)","sha":"df08786c98cd12e020934126e8d6af3f460d0a34","branchLabelMapping":{"^v8.11.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Core","Team:Security","technical
debt","release_note:skip","backport:all-open","v8.11.0"],"number":166177,"url":"https://github.com/elastic/kibana/pull/166177","mergeCommit":{"message":"[Flaky
#70928] Unskip test
(#166177)","sha":"df08786c98cd12e020934126e8d6af3f460d0a34"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v8.11.0","labelRegex":"^v8.11.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/166177","number":166177,"mergeCommit":{"message":"[Flaky
#70928] Unskip test
(#166177)","sha":"df08786c98cd12e020934126e8d6af3f460d0a34"}}]}]
BACKPORT-->

Co-authored-by: Alejandro Fernández Haro <alejandro.haro@elastic.co>

Author: kibanamachine

x-pack/test/functional_embedded/tests/iframe_embedded.ts

@@ -6,8 +6,6 @@
  */
 
 import Url from 'url';
-import expect from '@kbn/expect';
-
 import { FtrProviderContext } from '../ftr_provider_context';
 
 export default function ({ getService, getPageObjects }: FtrProviderContext) {
@@ -17,12 +15,8 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
   const testSubjects = getService('testSubjects');
   const retry = getService('retry');
 
-  // FLAKY https://github.com/elastic/kibana/issues/70928
-  describe.skip('in iframe', () => {
+  describe('in iframe', () => {
     it('should open Kibana for logged-in user', async () => {
-      const isChromeHiddenBefore = await PageObjects.common.isChromeHidden();
-      expect(isChromeHiddenBefore).to.be(true);
-
       await PageObjects.security.login();
 
       const { protocol, hostname, port } = config.get('servers.kibana');