Revert "DEV: Upgrade Rails to version 7.1 (#27539)"

This reverts commit 2301dddcff.

config/environments/development.rb

@@ -99,11 +99,4 @@ Discourse::Application.configure do
   end
 
   config.hosts << /\A(([a-z0-9-]+)\.)*localhost(\:\d+)?\Z/
-
-  config.generators.after_generate do |files|
-    parsable_files = files.filter { |file| file.end_with?(".rb") }
-    unless parsable_files.empty?
-      system("bundle exec rubocop -A --fail-level=E #{parsable_files.shelljoin}", exception: true)
-    end
-  end
 end

config/environments/test.rb

@@ -26,7 +26,7 @@ Discourse::Application.configure do
 
   # production has "show exceptions" on so we better have it
   # in test as well
-  config.action_dispatch.show_exceptions = :all
+  config.action_dispatch.show_exceptions = true
 
   # Disable request forgery protection in test environment
   config.action_controller.allow_forgery_protection = false
@@ -65,7 +65,6 @@ Discourse::Application.configure do
 
   # Catch missing translations during test runs.
   config.i18n.raise_on_missing_translations = true
-  config.i18n.load_path += Dir[Rails.root.join("spec", "support", "locales", "**", "*.yml")]
 
   config.after_initialize do
     ActiveRecord::LogSubscriber.backtrace_cleaner.add_silencer do |line|