Fix tinymce editor problems (#743)

Internal issue: https://2u-internal.atlassian.net/servicedesk/customer/portal/9/CR-6328?created=true

Reverted 6 merged PRs due to problems.

scroll was not working on editors
potential problems with editor content loading

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* Revert "fix(deps): update dependency @edx/frontend-lib-content-components to v1.177.4 (#742)"

This reverts commit cc40e9d6cb.

* Revert "feat: add escalation email field for LTI-based proctoring providers (#736)"

This reverts commit 0f483dc4e1.

* Revert "fix: video downloads (#728)"

This reverts commit c5abd21569.

* Revert "fix: import api to chunk file (#734)"

This reverts commit 6f7a992847.

* Revert "feat: Taxonomy delete dialog (#684)"

This reverts commit 1eff489158.

* Revert "fix(deps): update dependency @edx/frontend-lib-content-components to v1.177.1 (#727)"

This reverts commit dcabb77218.

src/taxonomy/data/api.test.js

@@ -9,8 +9,6 @@ import {
   getExportTaxonomyApiUrl,
   getTaxonomyListData,
   getTaxonomyExportFile,
-  getTaxonomyApiUrl,
-  deleteTaxonomy,
 } from './api';
 
 let axiosMock;
@@ -61,13 +59,6 @@ describe('taxonomy api calls', () => {
     expect(result).toEqual(taxonomyListMock);
   });
 
-  it('should delete a taxonomy', async () => {
-    axiosMock.onDelete(getTaxonomyApiUrl()).reply(200);
-    await deleteTaxonomy();
-
-    expect(axiosMock.history.delete[0].url).toEqual(getTaxonomyApiUrl());
-  });
-
   it('should set window.location.href correctly', () => {
     const pk = 1;
     const format = 'json';