Cleanup api_kaminari_count_with_limit feature flag

Changelog: removed

config/feature_flags/ops/api_kaminari_count_with_limit.yml

----
-name: api_kaminari_count_with_limit
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/23931
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/353077
-milestone: '11.8'
-type: ops
-group: group::integrations
-default_enabled: true

doc/api/features.md

@@ -89,22 +89,24 @@ Example response:
 ```json
 [
   {
-    "name": "api_kaminari_count_with_limit",
-    "introduced_by_url": "https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/23931",
-    "rollout_issue_url": null,
-    "milestone": "11.8",
-    "type": "ops",
-    "group": "group::ecosystem",
+    "name": "geo_pages_deployment_replication",
+    "introduced_by_url": "https://gitlab.com/gitlab-org/gitlab/-/merge_requests/68662",
+    "rollout_issue_url": "https://gitlab.com/gitlab-org/gitlab/-/issues/337676",
+    "milestone": "14.3",
+    "log_state_changes": null,
+    "type": "development",
+    "group": "group::geo",
     "default_enabled": true
   },
   {
-    "name": "marginalia",
-    "introduced_by_url": null,
-    "rollout_issue_url": null,
-    "milestone": null,
-    "type": "ops",
-    "group": null,
-    "default_enabled": false
+    "name": "analytics_devops_adoption_codeowners",
+    "introduced_by_url": "https://gitlab.com/gitlab-org/gitlab/-/merge_requests/59874",
+    "rollout_issue_url": "https://gitlab.com/gitlab-org/gitlab/-/issues/328542",
+    "milestone": "13.12",
+    "log_state_changes": null,
+    "type": "development",
+    "group": "group::optimize",
+    "default_enabled": true
   }
 ]
 ```

lib/gitlab/pagination/offset_pagination.rb

@@ -27,7 +27,6 @@ module Gitlab
                           end
 
         return pagination_data unless pagination_data.is_a?(ActiveRecord::Relation)
-        return pagination_data unless Feature.enabled?(:api_kaminari_count_with_limit, type: :ops, default_enabled: :yaml)
 
         limited_total_count = pagination_data.total_count_with_limit
         if limited_total_count > Kaminari::ActiveRecordRelationMethods::MAX_COUNT_LIMIT

spec/lib/gitlab/pagination/offset_pagination_spec.rb

@@ -66,25 +66,6 @@ RSpec.describe Gitlab::Pagination::OffsetPagination do
 
         let(:query) { base_query.merge(page: 1, per_page: 2) }
 
-        context 'when the api_kaminari_count_with_limit feature flag is unset' do
-          it_behaves_like 'paginated response'
-          it_behaves_like 'response with pagination headers'
-        end
-
-        context 'when the api_kaminari_count_with_limit feature flag is disabled' do
-          before do
-            stub_feature_flags(api_kaminari_count_with_limit: false)
-          end
-
-          it_behaves_like 'paginated response'
-          it_behaves_like 'response with pagination headers'
-        end
-
-        context 'when the api_kaminari_count_with_limit feature flag is enabled' do
-          before do
-            stub_feature_flags(api_kaminari_count_with_limit: true)
-          end
-
         context 'when resources count is less than MAX_COUNT_LIMIT' do
           before do
             stub_const("::Kaminari::ActiveRecordRelationMethods::MAX_COUNT_LIMIT", 4)
@@ -128,7 +109,6 @@ RSpec.describe Gitlab::Pagination::OffsetPagination do
 
           paginator.paginate(resource, exclude_total_headers: true)
         end
-        end
 
         context 'when resource already paginated' do
           let(:resource) { Project.all.page(1).per(1) }