chore: remove unused i18n feature

app/controllers/application_controller.rb

@@ -26,7 +26,6 @@ class ApplicationController < ActionController::Base
   helper_method :current_user
   helper_method :current_service
 
-  before_action :set_locale
   before_action :accept_terms, if: :logged_in?
 
   def render_not_found
@@ -131,11 +130,6 @@ def has_access?
 
   private
 
-  def set_locale
-    store_locale_to_cookie(params[:locale]) if locale
-    I18n.locale = cookies[:locale] || I18n.default_locale
-  end
-
   def user_not_authorized
     redirect_to(user_path, notice: 'You are not authorized to perform this action.')
   end
@@ -155,13 +149,4 @@ def redirect_back(fallback_location:, **args)
       redirect_to fallback_location, **args
     end
   end
-
-  def store_locale_to_cookie(locale)
-    cookies[:locale] = { value: locale,
-                         expires: Time.zone.now + 36_000 }
-  end
-
-  def locale
-    params[:locale] if params[:locale] && I18n.available_locales.include?(params[:locale].to_sym)
-  end
 end

config/initializers/locale.rb

@@ -2,5 +2,5 @@
 # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
 Rails.application.config.i18n.default_locale = :en
 Rails.application.config.i18n.fallbacks = true
-Rails.application.config.i18n.available_locales = [:en, :fr, :de]
+Rails.application.config.i18n.available_locales = [:en]
 #config.i18n.enforce_available_locales = false