Drop LB FF for ExpirePipelineCacheWorker

Changelog: removed

app/workers/expire_pipeline_cache_worker.rb

@@ -10,7 +10,7 @@ class ExpirePipelineCacheWorker
   queue_namespace :pipeline_cache
   urgency :high
   worker_resource_boundary :cpu
-  data_consistency :delayed, feature_flag: :load_balancing_for_expire_pipeline_cache_worker
+  data_consistency :delayed
 
   # This worker _should_ be idempotent, but due to us moving this to data_consistency :delayed
   # and an ongoing incompatibility between the two switches, we need to disable this.

config/feature_flags/development/load_balancing_for_expire_pipeline_cache_worker.yml

----
-name: load_balancing_for_expire_pipeline_cache_worker
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62073
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/331360
-milestone: '14.0'
-type: development
-group: group::memory
-default_enabled: false

spec/workers/expire_pipeline_cache_worker_spec.rb

@@ -50,7 +50,6 @@ RSpec.describe ExpirePipelineCacheWorker do
 
     it_behaves_like 'worker with data consistency',
                   described_class,
-                  feature_flag: :load_balancing_for_expire_pipeline_cache_worker,
                   data_consistency: :delayed
   end
 end