Remove subject check in publish observer

app/jobs/abf_worker/publish_observer.rb

@@ -4,7 +4,6 @@ module AbfWorker
 
     def real_perform
       @subject_class = BuildList
-      return if !subject
       return if status == STARTED # do nothing when publication started
       extra = options['extra']
       repository_status = RepositoryStatus.where(id: extra['repository_status_id']).first
@@ -88,4 +87,4 @@ module AbfWorker
       sort_results_and_save results, build_list
     end
   end
-end
+end