Remove PagesUpdateConfigurationWorker logic

It was left just to clean queues on upgrade.
Now we can remove the worker.

.rubocop_todo/gitlab/namespaced_class.yml

@@ -836,7 +836,6 @@ Gitlab/NamespacedClass:
   - app/workers/pages_domain_verification_cron_worker.rb
   - app/workers/pages_domain_verification_worker.rb
   - app/workers/pages_transfer_worker.rb
-  - app/workers/pages_update_configuration_worker.rb
   - app/workers/pages_worker.rb
   - app/workers/partition_creation_worker.rb
   - app/workers/pipeline_hooks_worker.rb

app/workers/all_queues.yml

@@ -2609,15 +2609,6 @@
   :weight: 1
   :idempotent:
   :tags: []
-- :name: pages_update_configuration
-  :worker_name: PagesUpdateConfigurationWorker
-  :feature_category: :pages
-  :has_external_dependencies:
-  :urgency: :low
-  :resource_boundary: :unknown
-  :weight: 1
-  :idempotent: true
-  :tags: []
 - :name: phabricator_import_import_tasks
   :worker_name: Gitlab::PhabricatorImport::ImportTasksWorker
   :feature_category: :importers

app/workers/pages_update_configuration_worker.rb

-# frozen_string_literal: true
-
-# TODO: remove this in 14.7 https://gitlab.com/gitlab-org/gitlab/-/issues/348582
-class PagesUpdateConfigurationWorker
-  include ApplicationWorker
-
-  data_consistency :always
-
-  sidekiq_options retry: 1
-
-  idempotent!
-  feature_category :pages
-
-  def perform(_project_id)
-    # Do nothing
-  end
-end

config/sidekiq_queues.yml

@@ -309,8 +309,6 @@
   - 1
 - - pages_transfer
   - 1
-- - pages_update_configuration
-  - 1
 - - personal_access_tokens
   - 1
 - - phabricator_import_import_tasks

spec/workers/every_sidekiq_worker_spec.rb

@@ -369,7 +369,6 @@ RSpec.describe 'Every Sidekiq worker' do
         'PagesDomainSslRenewalWorker' => 3,
         'PagesDomainVerificationWorker' => 3,
         'PagesTransferWorker' => 3,
-        'PagesUpdateConfigurationWorker' => 1,
         'PagesWorker' => 3,
         'PersonalAccessTokens::Groups::PolicyWorker' => 3,
         'PersonalAccessTokens::Instance::PolicyWorker' => 3,

spec/workers/pages_update_configuration_worker_spec.rb

-# frozen_string_literal: true
-require "spec_helper"
-
-RSpec.describe PagesUpdateConfigurationWorker do
-  let_it_be(:project) { create(:project) }
-
-  describe "#perform" do
-    it "does not break" do
-      expect { subject.perform(-1) }.not_to raise_error
-    end
-  end
-end