Merge branch '240906-remove-ff-search-track-unique-users' into 'master'

Remove search_track_unique_users ff [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!60706

changelogs/unreleased/240906-remove-ff-search-track-unique-users.yml

+---
+title: Remove search_track_unique_users feature flag
+merge_request: 60706
+author:
+type: other

config/feature_flags/development/search_track_unique_users.yml

----
-name: search_track_unique_users
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/40134
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/240906
-milestone: '13.4'
-type: development
-group: group::global search
-default_enabled: true

lib/gitlab/usage_data_counters/known_events/common.yml

@@ -53,17 +53,14 @@
   category: search
   redis_slot: search
   aggregation: weekly
-  feature_flag: search_track_unique_users
 - name: i_search_advanced
   category: search
   redis_slot: search
   aggregation: weekly
-  feature_flag: search_track_unique_users
 - name: i_search_paid
   category: search
   redis_slot: search
   aggregation: weekly
-  feature_flag: search_track_unique_users
 - name: wiki_action
   category: source_code
   aggregation: daily