Merge branch...

Merge branch 'delete-old-feature-flags-zoekt_increased_concurrency_indexing_task_worker' into 'master' 

Delete the `zoekt_increased_concurrency_indexing_task_worker` feature flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183211



Merged-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Approved-by: Dmitry Gruzd <dgruzd@gitlab.com>
Approved-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Co-authored-by: Siddharth Dungarwal <sdungarwal@gitlab.com>

ee/app/workers/search/zoekt/indexing_task_worker.rb

@@ -11,9 +11,7 @@ class IndexingTaskWorker
       idempotent!
       urgency :low
 
-      concurrency_limit -> {
-        2_000 if Feature.enabled?(:zoekt_increased_concurrency_indexing_task_worker, Feature.current_request)
-      }
+      concurrency_limit -> { 2_000 }
 
       defer_on_database_health_signal :gitlab_main, [:zoekt_nodes, :zoekt_indices, :zoekt_tasks], 10.minutes
 

ee/config/feature_flags/ops/zoekt_increased_concurrency_indexing_task_worker.yml

----
-name: zoekt_increased_concurrency_indexing_task_worker
-feature_issue_url:
-introduced_by_url:
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/503346
-milestone: '17.6'
-group: group::global search
-type: ops
-default_enabled: true