Allow users on premium to delete subepics

- they can see them and should be able to remove them

ee/app/controllers/groups/epic_links_controller.rb

@@ -3,8 +3,8 @@
 class Groups::EpicLinksController < Groups::ApplicationController
   include EpicRelations
 
-  before_action :check_epics_available!, only: :index
-  before_action :check_subepics_available!, only: [:create, :destroy, :update]
+  before_action :check_epics_available!, only: [:index, :destroy]
+  before_action :check_subepics_available!, only: [:create, :update]
 
   def update
     result = EpicLinks::UpdateService.new(child_epic, current_user, params[:epic]).execute

ee/app/services/epic_links/destroy_service.rb

@@ -26,8 +26,8 @@ module EpicLinks
     def permission_to_remove_relation?
       child_epic.present? &&
         parent_epic.present? &&
-        can?(current_user, :admin_epic_link, parent_epic) &&
-        can?(current_user, :admin_epic_link, child_epic)
+        can?(current_user, :admin_epic, parent_epic) &&
+        can?(current_user, :admin_epic, child_epic)
     end
 
     def not_found_message

ee/spec/controllers/groups/epic_links_controller_spec.rb

@@ -176,6 +176,8 @@ describe Groups::EpicLinksController do
       epic1.update(parent: parent_epic)
     end
 
+    let(:features_when_forbidden) { { epics: false } }
+
     subject { delete :destroy, params: { group_id: group, epic_id: parent_epic.to_param, id: epic1.id } }
 
     it_behaves_like 'unlicensed subepics action'

ee/spec/services/epic_links/destroy_service_spec.rb

@@ -45,9 +45,9 @@ describe EpicLinks::DestroyService do
       described_class.new(child_epic, user).execute
     end
 
-    context 'when subepics feature is disabled' do
+    context 'when epics feature is disabled' do
       before do
-        stub_licensed_features(epics: true, subepics: false)
+        stub_licensed_features(epics: false)
       end
 
       subject { remove_epic_relation(child_epic) }
@@ -55,9 +55,9 @@ describe EpicLinks::DestroyService do
       include_examples 'returns not found error'
     end
 
-    context 'when subepics feature is enabled' do
+    context 'when epics feature is enabled' do
       before do
-        stub_licensed_features(epics: true, subepics: true)
+        stub_licensed_features(epics: true)
       end
 
       context 'when the user has no permissions to remove epic relation' do