Remove useless code (#4416)

api/controllers/web/feature.py

@@ -0,0 +1,12 @@
+from flask_restful import Resource
+
+from controllers.web import api
+from services.feature_service import FeatureService
+
+
+class SystemFeatureApi(Resource):
+    def get(self):
+        return FeatureService.get_system_features().dict()
+
+
+api.add_resource(SystemFeatureApi, '/system-features')