Remove duplicate Translation classes

We accidentally added them twice when rebasing the translations branch.

app/models/budget.rb

@@ -229,16 +229,4 @@ class Budget < ApplicationRecord
     slug.nil? || drafting?
   end
 
-  class Translation < Globalize::ActiveRecord::Translation
-    validate :name_uniqueness_by_budget
-
-    def name_uniqueness_by_budget
-      if Budget.joins(:translations)
-               .where(name: name)
-               .where.not("budget_translations.budget_id": budget_id).any?
-        errors.add(:name, I18n.t("errors.messages.taken"))
-      end
-    end
-  end
-
 end

app/models/budget/group.rb

@@ -39,19 +39,5 @@ class Budget
     def generate_slug?
       slug.nil? || budget.drafting?
     end
-
-    class Translation < Globalize::ActiveRecord::Translation
-      delegate :budget, to: :globalized_model
-
-      validate :name_uniqueness_by_budget
-
-      def name_uniqueness_by_budget
-        if budget.groups.joins(:translations)
-                        .where(name: name)
-                        .where.not("budget_group_translations.budget_group_id": budget_group_id).any?
-          errors.add(:name, I18n.t("errors.messages.taken"))
-        end
-      end
-    end
   end
 end

app/models/budget/heading.rb

@@ -59,20 +59,5 @@ class Budget
     def generate_slug?
       slug.nil? || budget.drafting?
     end
-
-    class Translation < Globalize::ActiveRecord::Translation
-      delegate :budget, to: :globalized_model
-
-      validate :name_uniqueness_by_budget
-
-      def name_uniqueness_by_budget
-        if budget.headings
-                 .joins(:translations)
-                 .where(name: name)
-                 .where.not("budget_heading_translations.budget_heading_id": budget_heading_id).any?
-          errors.add(:name, I18n.t("errors.messages.taken"))
-        end
-      end
-    end
   end
 end