Remove delayed_perform_for_build_hooks_worker feature flag

Changelog: other
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62196

app/workers/build_hooks_worker.rb

@@ -11,16 +11,6 @@ class BuildHooksWorker # rubocop:disable Scalability/IdempotentWorker
   urgency :high
   data_consistency :delayed, feature_flag: :load_balancing_for_build_hooks_worker
 
-  DATA_CONSISTENCY_DELAY = 3
-
-  def self.perform_async(*args)
-    if Feature.enabled?(:delayed_perform_for_build_hooks_worker, default_enabled: :yaml)
-      perform_in(DATA_CONSISTENCY_DELAY.seconds, *args)
-    else
-      super
-    end
-  end
-
   # rubocop: disable CodeReuse/ActiveRecord
   def perform(build_id)
     Ci::Build.includes({ runner: :tags })

config/feature_flags/development/delayed_perform_for_build_hooks_worker.yml

----
-name: delayed_perform_for_build_hooks_worker
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61149
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/330132
-milestone: '13.12'
-type: development
-group: group::memory
-default_enabled: false

spec/workers/build_hooks_worker_spec.rb

@@ -24,20 +24,8 @@ RSpec.describe BuildHooksWorker do
   end
 
   describe '.perform_async' do
-    context 'when delayed_perform_for_build_hooks_worker feature flag is disabled' do
-      before do
-        stub_feature_flags(delayed_perform_for_build_hooks_worker: false)
-      end
-
-      it 'delays scheduling a job by calling perform_in with default delay' do
-        expect(described_class).to receive(:perform_in).with(ApplicationWorker::DEFAULT_DELAY_INTERVAL.second, 123)
-
-        described_class.perform_async(123)
-      end
-    end
-
-    it 'delays scheduling a job by calling perform_in' do
-      expect(described_class).to receive(:perform_in).with(described_class::DATA_CONSISTENCY_DELAY.second, 123)
+    it 'delays scheduling a job by calling perform_in with default delay' do
+      expect(described_class).to receive(:perform_in).with(ApplicationWorker::DEFAULT_DELAY_INTERVAL.second, 123)
 
       described_class.perform_async(123)
     end