Remove unused action in controller callbacks

With Rails 7.1, callbacks only work with actions that are defined
on the controller. This check allowed us to notice we had this some
no more used actions.

This commit also enable the new configuration in the dummy app so we
will be able to spot new errors. The configuration needs to be defined
explicitely because it's not part of the load_defaults but it's copied
in the dummy application directly.

api/app/controllers/spree/api/payments_controller.rb

@@ -1,11 +1,9 @@
-# frozen_string_literal: true
-
 module Spree
   module Api
     class PaymentsController < Spree::Api::BaseController
       before_action :find_order
-      around_action :lock_order, only: [:create, :update, :destroy, :authorize, :capture, :purchase, :void, :credit]
-      before_action :find_payment, only: [:update, :show, :authorize, :purchase, :capture, :void, :credit]
+      around_action :lock_order, only: [:create, :update, :authorize, :capture, :purchase, :void]
+      before_action :find_payment, only: [:update, :show, :authorize, :purchase, :capture, :void]
 
       def index
         @payments = paginate(@order.payments.ransack(params[:q]).result)

backend/app/controllers/spree/admin/adjustments_controller.rb

@@ -9,7 +9,7 @@ class AdjustmentsController < ResourceController
       destroy.after :update_totals
       update.after :update_totals
 
-      skip_before_action :load_resource, only: [:toggle_state, :edit, :update, :destroy]
+      skip_before_action :load_resource, only: [:edit, :update, :destroy]
 
       before_action :find_adjustment, only: [:destroy, :edit, :update]
 

core/lib/spree/testing_support/dummy_app.rb

@@ -51,6 +51,10 @@ class Application < ::Rails::Application
     config.action_mailer.perform_caching = false
     config.i18n.fallbacks = true
 
+    if Rails.gem_version >= Gem::Version.new('7.1')
+      config.action_controller.raise_on_missing_callback_actions = true
+    end
+
     # In the test environment, we use the `caching: true` RSpec metadata to
     # enable caching on select specs. See
     # core/lib/spree/testing_support/caching.rb. See also