Merge branch 'remove-ancestor-flag' into 'master'

Remove preset_group_root feature flag

Closes #33638

See merge request gitlab-org/gitlab!22165

changelogs/unreleased/remove-ancestor-flag.yml

+---
+title: Remove N+1 query issue when checking group root ancestor.
+merge_request:
+author:
+type: performance

ee/app/models/ee/group.rb

@@ -129,7 +129,7 @@ module EE
         # preset root_ancestor for all of them to avoid an additional SQL query
         # done for each group permission check:
         # https://gitlab.com/gitlab-org/gitlab/issues/11539
-        preset_root_ancestor_for(groups) if same_root && ::Feature.enabled?(:preset_group_root)
+        preset_root_ancestor_for(groups) if same_root
 
         DeclarativePolicy.user_scope do
           groups.select { |group| Ability.allowed?(user, :read_epic, group) }

ee/spec/models/group_spec.rb

@@ -233,22 +233,6 @@ describe Group do
         end
       end
 
-      context 'with `preset_group_root` feature flag disabled' do
-        before do
-          stub_feature_flags(preset_group_root: false)
-        end
-
-        it_behaves_like 'group root ancestor' do
-          let(:params) { {} }
-          let(:extra_query_count) { 6 }
-        end
-      end
-
-      context 'with `preset_group_root` feature flag enabled' do
-        before do
-          stub_feature_flags(preset_group_root: true)
-        end
-
       context 'when same_root is false' do
         let(:params) { { same_root: false } }
 
@@ -276,7 +260,6 @@ describe Group do
       end
     end
   end
-  end
 
   describe '#vulnerable_projects' do
     it "fetches the group's projects that have vulnerabilities" do