Remove saml_group_links feature flag

Removes the GitLab.com-only saml_group_links feature flag. The
feature has been default-enabled on GitLab.com since 13.7 with
no issues requiring it be disabled.

config/feature_flags/development/saml_group_links.yml

----
-name: saml_group_links
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/45080
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/267020
-milestone: '13.6'
-type: development
-group: group::access
-default_enabled: true

ee/app/controllers/groups/saml_group_links_controller.rb

@@ -2,7 +2,6 @@
 
 module Groups
   class SamlGroupLinksController < Groups::ApplicationController
-    before_action :require_saml_group_links_enabled
     before_action :authorize_admin_saml_group_links!
 
     layout 'group_settings'
@@ -29,10 +28,6 @@ module Groups
 
     private
 
-    def require_saml_group_links_enabled
-      render_404 unless ::Feature.enabled?(:saml_group_links, group, default_enabled: true)
-    end
-
     def authorize_admin_saml_group_links!
       access_denied! unless can?(current_user, :admin_saml_group_links, group)
     end

ee/app/models/ee/group.rb

@@ -227,8 +227,7 @@ module EE
     end
 
     def saml_group_sync_available?
-      ::Feature.enabled?(:saml_group_links, self, default_enabled: true) &&
-        feature_available?(:group_saml_group_sync) && root_ancestor.saml_enabled?
+      feature_available?(:group_saml_group_sync) && root_ancestor.saml_enabled?
     end
 
     override :multiple_issue_boards_available?

ee/changelogs/unreleased/dblessing_remove_saml_group_links_ff.yml

+---
+title: Remove saml_group_links feature flag
+merge_request: 54986
+author:
+type: changed

ee/spec/controllers/groups/saml_group_links_controller_spec.rb

@@ -12,7 +12,6 @@ RSpec.describe Groups::SamlGroupLinksController do
 
   before do
     stub_licensed_features(group_saml: true, group_saml_group_sync: true)
-    stub_feature_flags(saml_group_links: true)
 
     sign_in(user)
   end
@@ -21,14 +20,6 @@ RSpec.describe Groups::SamlGroupLinksController do
     let_it_be(:saml_provider) { create(:saml_provider, group: group, enabled: true) }
     let_it_be(:params) { route_params }
 
-    it 'renders 404 when the feature is disabled' do
-      stub_feature_flags(saml_group_links: false)
-
-      call_action
-
-      expect(response).to have_gitlab_http_status(:not_found)
-    end
-
     it 'renders 404 when the user is not authorized' do
       allow(controller).to receive(:can?).and_call_original
       allow(controller).to receive(:can?).with(user, :admin_saml_group_links, group).and_return(false)

ee/spec/features/groups/saml_group_links_spec.rb

@@ -14,7 +14,6 @@ RSpec.describe 'SAML group links' do
   context 'when SAML group links is available' do
     before do
       stub_licensed_features(group_saml: true, group_saml_group_sync: true)
-      stub_feature_flags(saml_group_links: true)
 
       create(:saml_provider, group: group, enabled: true)
 

ee/spec/models/group_spec.rb

@@ -799,42 +799,28 @@ RSpec.describe Group do
   describe '#saml_group_sync_available?' do
     subject { group.saml_group_sync_available? }
 
-    context 'when saml_group_links is not enabled' do
-      before do
-        stub_feature_flags(saml_group_links: false)
-      end
-
-      it { is_expected.to eq(false) }
-    end
+    it { is_expected.to eq(false) }
 
-    context 'when saml_group_links is enabled' do
+    context 'with group_saml_group_sync feature licensed' do
       before do
-        stub_feature_flags(saml_group_links: true)
+        stub_licensed_features(group_saml_group_sync: true)
       end
 
       it { is_expected.to eq(false) }
 
-      context 'with group_saml_group_sync feature licensed' do
+      context 'with saml enabled' do
         before do
-          stub_licensed_features(group_saml_group_sync: true)
+          create(:saml_provider, group: group, enabled: true)
         end
 
-        it { is_expected.to eq(false) }
+        it { is_expected.to eq(true) }
 
-        context 'with saml enabled' do
-          before do
-            create(:saml_provider, group: group, enabled: true)
-          end
+        context 'when the group is a subgroup' do
+          let(:subgroup) { create(:group, :private, parent: group) }
 
-          it { is_expected.to eq(true) }
-
-          context 'when the group is a subgroup' do
-            let(:subgroup) { create(:group, :private, parent: group) }
-
-            subject { subgroup.saml_group_sync_available? }
+          subject { subgroup.saml_group_sync_available? }
 
-            it { is_expected.to eq(true) }
-          end
+          it { is_expected.to eq(true) }
         end
       end
     end

ee/spec/workers/group_saml_group_sync_worker_spec.rb

@@ -29,7 +29,6 @@ RSpec.describe GroupSamlGroupSyncWorker do
     context 'when the group has group_saml_group_sync feature licensed' do
       before do
         stub_licensed_features(group_saml_group_sync: true)
-        stub_feature_flags(saml_group_links: true)
       end
 
       context 'when SAML is not enabled' do

spec/lib/gitlab/ci/variables/collection/sort_spec.rb

@@ -214,7 +214,6 @@ RSpec.describe Gitlab::Ci::Variables::Collection::Sort do
     context 'when FF :variable_inside_variable is enabled' do
       before do
         stub_licensed_features(group_saml_group_sync: true)
-        stub_feature_flags(saml_group_links: true)
         stub_feature_flags(variable_inside_variable: true)
       end