diff --git a/config/initializers/new_framework_defaults.rb b/config/initializers/new_framework_defaults.rb
index cbf423a..9613e36 100644
--- a/config/initializers/new_framework_defaults.rb
+++ b/config/initializers/new_framework_defaults.rb
@@ -5,21 +5,3 @@
 # Once upgraded flip defaults one by one to migrate to the new default.
 #
 # Read the Guide for Upgrading Ruby on Rails for more info on each option.
-
-Rails.application.config.action_controller.raise_on_unfiltered_parameters = true
-
-# Enable per-form CSRF tokens. Previous versions had false.
-Rails.application.config.action_controller.per_form_csrf_tokens = false
-
-# Enable origin-checking CSRF mitigation. Previous versions had false.
-Rails.application.config.action_controller.forgery_protection_origin_check = false
-
-# Make Ruby 2.4 preserve the timezone of the receiver when calling `to_time`.
-# Previous versions had false.
-ActiveSupport.to_time_preserves_timezone = false
-
-# Require `belongs_to` associations by default. Previous versions had false.
-Rails.application.config.active_record.belongs_to_required_by_default = false
-
-# Do not halt callback chains when a callback returns false. Previous versions had true.
-ActiveSupport.halt_callback_chains_on_return_false = true