Fix poll options not rendering text after vote/refresh (#10189)

* Fix poll options not rendering text after vote/refresh

* Fix poll options not showing up on public pages

* Fix code style issue

app/javascript/mastodon/reducers/polls.js

@@ -1,4 +1,3 @@
-import { POLL_VOTE_SUCCESS, POLL_FETCH_SUCCESS } from 'mastodon/actions/polls';
 import { POLLS_IMPORT } from 'mastodon/actions/importer';
 import { Map as ImmutableMap, fromJS } from 'immutable';
 
@@ -10,9 +9,6 @@ export default function polls(state = initialState, action) {
   switch(action.type) {
   case POLLS_IMPORT:
     return importPolls(state, action.polls);
-  case POLL_VOTE_SUCCESS:
-  case POLL_FETCH_SUCCESS:
-    return importPolls(state, [action.poll]);
   default:
     return state;
   }