Project: clear decltype and declvalue when project is no longer declarative

src/lib/Hydra/Controller/Project.pm

@@ -171,6 +171,10 @@ sub updateProject {
             });
     } else {
         $project->jobsets->search({ name => ".jobsets" })->delete;
+        $project->update(
+            { decltype => ""
+            , declvalue => ""
+            });
     }
 }