Every campaign has an end.

Drop ahoy, because it's more trouble than it's worth. This means dropping
visits, campaigns, targets.

Campaigns are better run to analytics, such as:
* https://matomo.org/docs/tracking-campaigns/
* https://matomo.org/docs/tracking-goals-web-analytics/
* https://support.google.com/analytics/answer/1012040?hl=en

config/routes.rb

@@ -14,8 +14,6 @@ Osem::Application.routes.draw do
                path: 'accounts'
   end
 
-  mount Ahoy::Engine => '/ahoy'
-
   # Use letter_opener_web to open mails in browser (e.g. necessary for Vagrant)
   if Rails.env.development?
     mount LetterOpenerWeb::Engine, at: "/letter_opener"
@@ -125,8 +123,6 @@ Osem::Application.routes.draw do
       resources :tickets
       resources :sponsors, except: [:show]
       resources :lodgings, except: [:show]
-      resources :targets, except: [:show]
-      resources :campaigns, except: [:show]
       resources :emails, only: [:show, :update, :index]
       resources :physical_tickets, only: [:index]
       resources :roles, except: [:new, :create] do