Flipper: remove deprecated conf

https://github.com/jnunemaker/flipper/pull/523

config/application.rb

@@ -64,8 +64,6 @@ module TPS
     end
 
     config.middleware.use Rack::Attack
-    # Ensure we make maximum one call per feature per request.
-    config.middleware.use Flipper::Middleware::Memoizer
 
     config.ds_env = ENV.fetch('DS_ENV', Rails.env)
 

config/initializers/flipper.rb

@@ -1,9 +1,3 @@
-Flipper.configure do |config|
-  config.default do
-    Flipper.new(Flipper::Adapters::ActiveRecord.new)
-  end
-end
-
 Flipper.register('Administrateurs') do |user|
   user.administrateur_id.present?
 end