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/features/ui/util/async-components.js

@@ -129,7 +129,3 @@ export function EmbedModal () {
 export function ListEditor () {
   return import(/* webpackChunkName: "features/list_editor" */'../../list_editor');
 }
-
-export function Trends () {
-  return import(/* webpackChunkName: "features/trends" */'../../trends');
-}