Remove load_balancing_for_web_hook_worker FF

Changelog: removed

app/workers/web_hook_worker.rb

@@ -8,7 +8,7 @@ class WebHookWorker
   feature_category :integrations
   worker_has_external_dependencies!
   loggable_arguments 2
-  data_consistency :delayed, feature_flag: :load_balancing_for_web_hook_worker
+  data_consistency :delayed
 
   sidekiq_options retry: 4, dead: false
 

config/feature_flags/development/load_balancing_for_web_hook_worker.yml

----
-name: load_balancing_for_web_hook_worker
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62075
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/331365
-milestone: '14.0'
-type: development
-group: group::memory
-default_enabled: false

spec/workers/web_hook_worker_spec.rb

@@ -17,7 +17,6 @@ RSpec.describe WebHookWorker do
 
     it_behaves_like 'worker with data consistency',
                   described_class,
-                  feature_flag: :load_balancing_for_web_hook_worker,
                   data_consistency: :delayed
   end
 end