Remove unused remote unfollow controller (#11250)

config/locales/en.yml

@@ -810,10 +810,6 @@ en:
     reply:
       proceed: Proceed to reply
       prompt: 'You want to reply to this toot:'
-  remote_unfollow:
-    error: Error
-    title: Title
-    unfollowed: Unfollowed
   scheduled_statuses:
     over_daily_limit: You have exceeded the limit of %{limit} scheduled toots for that day
     over_total_limit: You have exceeded the limit of %{limit} scheduled toots

config/routes.rb

@@ -141,8 +141,6 @@ Rails.application.routes.draw do
   get '/public', to: 'public_timelines#show', as: :public_timeline
   get '/media_proxy/:id/(*any)', to: 'media_proxy#show', as: :media_proxy
 
-  # Remote follow
-  resource :remote_unfollow, only: [:create]
   resource :authorize_interaction, only: [:show, :create]
   resource :share, only: [:show, :create]