Remove trending hashtags (#7711)

* Delete trends_controller.rb

* Update routes.rb

* Update trending_tags.rb

* Update index.js

* Update index.js

* Update search_results.js

* Update async-components.js

* Update index.js

* Delete trends.js

* Delete trends.js

* Delete trends_container.js

* Delete trends.js

* Update search_results.js

* Update search_results_container.js

app/javascript/mastodon/actions/trends.js

@@ -1,32 +0,0 @@
-import api from '../api';
-
-export const TRENDS_FETCH_REQUEST = 'TRENDS_FETCH_REQUEST';
-export const TRENDS_FETCH_SUCCESS = 'TRENDS_FETCH_SUCCESS';
-export const TRENDS_FETCH_FAIL    = 'TRENDS_FETCH_FAIL';
-
-export const fetchTrends = () => (dispatch, getState) => {
-  dispatch(fetchTrendsRequest());
-
-  api(getState)
-    .get('/api/v1/trends')
-    .then(({ data }) => dispatch(fetchTrendsSuccess(data)))
-    .catch(err => dispatch(fetchTrendsFail(err)));
-};
-
-export const fetchTrendsRequest = () => ({
-  type: TRENDS_FETCH_REQUEST,
-  skipLoading: true,
-});
-
-export const fetchTrendsSuccess = trends => ({
-  type: TRENDS_FETCH_SUCCESS,
-  trends,
-  skipLoading: true,
-});
-
-export const fetchTrendsFail = error => ({
-  type: TRENDS_FETCH_FAIL,
-  error,
-  skipLoading: true,
-  skipAlert: true,
-});