Remove FF load balancing for deployments hooks worker

Changelog: removed
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/69557

app/workers/deployments/hooks_worker.rb

@@ -4,7 +4,7 @@ module Deployments
   class HooksWorker # rubocop:disable Scalability/IdempotentWorker
     include ApplicationWorker
 
-    data_consistency :delayed, feature_flag: :load_balancing_for_deployments_hooks_worker
+    data_consistency :delayed
 
     queue_namespace :deployment
     feature_category :continuous_delivery

config/feature_flags/development/load_balancing_for_deployments_hooks_worker.yml

----
-name: load_balancing_for_deployments_hooks_worker
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/67878
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/338342
-milestone: '14.2'
-type: development
-group: group::release
-default_enabled: false

spec/workers/deployments/hooks_worker_spec.rb

@@ -52,7 +52,6 @@ RSpec.describe Deployments::HooksWorker do
 
     it_behaves_like 'worker with data consistency',
                     described_class,
-                    feature_flag: :load_balancing_for_deployments_hooks_worker,
                     data_consistency: :delayed
   end
 end