use env for localization to avoid db round trip

app/controllers/application_controller.rb

@@ -309,7 +309,7 @@ class ApplicationController < ActionController::Base
   end
 
   def set_locale
-    if feature_enabled?(:localization)
+    if ENV.fetch('LOCALIZATION_ENABLED', 'false') == 'true'
       I18n.locale = http_accept_language.compatible_language_from(I18n.available_locales)
     end
   end

config/env.example.optional

@@ -69,3 +69,6 @@ DS_ENV="staging"
 
 # Active le mode maintenance
 # MAINTENANCE_MODE="true"
+
+# Active la localisation
+# LOCALIZATION_ENABLED="true"

config/initializers/flipper.rb

@@ -32,7 +32,6 @@ features = [
   :expert_not_allowed_to_invite,
   :hide_instructeur_email,
   :instructeur_bypass_email_login_token,
-  :localization,
   :make_experts_notifiable,
   :procedure_routage_api
 ]