Revert "Add Youtube videos to the map (#13592)"

This reverts commit 4a3fcba501.

common/app/redux/index.js

@@ -1,12 +1,10 @@
 import fetchUserSaga from './fetch-user-saga';
 import loadCurrentChallengeSaga from './load-current-challenge-saga';
-import fetchYoutubeSaga from './fetch-youtube-saga';
 
 export { default as reducer } from './reducer';
 export * as actions from './actions';
 export { default as types } from './types';
 export const sagas = [
   fetchUserSaga,
-  loadCurrentChallengeSaga,
-  fetchYoutubeSaga
+  loadCurrentChallengeSaga
 ];