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

spec/factories/campaigns.rb

@@ -1,11 +0,0 @@
-# frozen_string_literal: true
-
-# Read about factories at https://github.com/thoughtbot/factory_bot
-
-FactoryBot.define do
-  factory :campaign do
-    name { 'Test Campaign' }
-    utm_campaign { 'testcampaign' }
-    conference
-  end
-end

spec/factories/conferences.rb

@@ -46,8 +46,6 @@ FactoryBot.define do
         create_list(:sponsor, 2, sponsorship_level: conference.sponsorship_levels.second, conference: conference)
         create_list(:sponsor, 3, sponsorship_level: conference.sponsorship_levels.third, conference: conference)
 
-        create(:campaign, conference: conference)
-        create(:target, conference: conference)
         create(:question, conferences: [conference])
 
         # Logo...

spec/factories/targets.rb

@@ -1,12 +0,0 @@
-# frozen_string_literal: true
-
-# Read about factories at https://github.com/thoughtbot/factory_bot
-
-FactoryBot.define do
-  factory :target do
-    due_date { 14.days.from_now }
-    target_count { 100 }
-    unit { Target.units[:submissions] }
-    conference
-  end
-end

spec/factories/visits.rb

@@ -1,8 +0,0 @@
-# frozen_string_literal: true
-
-# Read about factories at https://github.com/thoughtbot/factory_bot
-
-FactoryBot.define do
-  factory :visit do
-  end
-end