Remove optimize_deploy_keys_presenter feature flag

This commit removes the optimize_deploy_keys_presenter feature flag
as it's deemed stable.

app/presenters/projects/settings/deploy_keys_presenter.rb

@@ -42,18 +42,9 @@ module Projects
       # It excludes:
       # - The deploy keys enabled in the project
       def available_project_keys
-        if Feature.enabled?(:optimize_deploy_keys_presenter, project, default_enabled: :yaml)
         strong_memoize(:available_project_keys) do
           current_user.project_deploy_keys.with_projects - enabled_keys
         end
-        else
-          strong_memoize(:legacy_available_project_keys) do
-            current_user
-              .project_deploy_keys
-              .id_not_in(enabled_keys.select(:id))
-              .with_projects
-          end
-        end
       end
 
       # It includes:
@@ -61,23 +52,9 @@ module Projects
       # It excludes:
       # - The deploy keys enabled in the project.
       def available_public_keys
-        if Feature.enabled?(:optimize_deploy_keys_presenter, project, default_enabled: :yaml)
         strong_memoize(:available_public_keys) do
           DeployKey.are_public.with_projects - enabled_keys
         end
-        else
-          strong_memoize(:legacy_available_public_keys) do
-            # This also excludes "Enabled deploy keys in projects that can be accessed by the user".
-            # However, this means we are filtering out a public key that enabled
-            # in the other project, which should be also available for this project.
-            # We should expose the public keys that has not been enabled on the project yet.
-            DeployKey
-              .are_public
-              .id_not_in(enabled_keys.select(:id))
-              .id_not_in(available_project_keys.select(:id))
-              .with_projects
-          end
-        end
       end
 
       def as_json
@@ -110,17 +87,10 @@ module Projects
 
       # rubocop: disable CodeReuse/ActiveRecord
       def user_readable_project_ids
-        project_ids = if Feature.enabled?(:optimize_deploy_keys_presenter, project, default_enabled: :yaml)
-                        (available_project_keys + available_public_keys)
-                          .flat_map { |deploy_key| deploy_key.deploy_keys_projects.map(&:project_id) }
-                          .compact
-                          .uniq
-                      else
-                        (available_keys + available_project_keys + available_public_keys)
+        project_ids = (available_project_keys + available_public_keys)
           .flat_map { |deploy_key| deploy_key.deploy_keys_projects.map(&:project_id) }
           .compact
           .uniq
-                      end
 
         current_user.authorized_projects(Gitlab::Access::GUEST).id_in(project_ids).pluck(:id)
       end

changelogs/unreleased/remove-optimize_deploy_keys_presenter-feature-flag.yml

+---
+title: Optimize Deploy Keys Presenter
+merge_request: 57551
+author:
+type: performance

config/feature_flags/development/optimize_deploy_keys_presenter.yml

----
-name: optimize_deploy_keys_presenter
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56305/diffs
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/324143
-milestone: '13.10'
-type: development
-group: group::release
-default_enabled: false

spec/presenters/projects/settings/deploy_keys_presenter_spec.rb

@@ -27,7 +27,6 @@ RSpec.describe Projects::Settings::DeployKeysPresenter do
     let_it_be(:unrelated_project) { create(:project, :private) }
     let_it_be(:unrelated_deploy_key) { create(:deploy_key, projects: [unrelated_project]) }
 
-    shared_examples_for 'correct behavior' do
     context 'with enabled keys' do
       it 'returns correct deploy keys' do
         expect(presenter.enabled_keys).to eq([deploy_key])
@@ -56,17 +55,6 @@ RSpec.describe Projects::Settings::DeployKeysPresenter do
     end
   end
 
-    it_behaves_like 'correct behavior'
-
-    context 'when optimize_deploy_keys_presenter feature flag is disabled' do
-      before do
-        stub_feature_flags(optimize_deploy_keys_presenter: false)
-      end
-
-      it_behaves_like 'correct behavior'
-    end
-  end
-
   describe '#enabled_keys' do
     let!(:deploy_key) { create(:deploy_key, public: true) }