diff --git a/force_bdss/kpi/i_kpi_calculator_bundle.py b/force_bdss/kpi/i_kpi_calculator_bundle.py
index 7bedd6a3b686200f02c50cb513358a4583dd818f..3c815d66745505d87bb0fca73b8a26b5a2b9462e 100644
--- a/force_bdss/kpi/i_kpi_calculator_bundle.py
+++ b/force_bdss/kpi/i_kpi_calculator_bundle.py
@@ -10,6 +10,7 @@ class IKPICalculatorBundle(Interface):
     name = String()
 
     plugin = Instance(Plugin)
+
     def create_kpi_calculator(self):
         pass
 
diff --git a/force_bdss/mco/base_mco_communicator.py b/force_bdss/mco/base_mco_communicator.py
index aaa539b85f36d887ad2b5e8b08da3c69aa003c77..25829db56fa10c1fb8e8043ad163cb29fdddb256 100644
--- a/force_bdss/mco/base_mco_communicator.py
+++ b/force_bdss/mco/base_mco_communicator.py
@@ -2,8 +2,6 @@ import abc
 
 from traits.api import ABCHasStrictTraits, Instance
 
-from .base_mco_model import BaseMCOModel
-from ..bdss_application import BDSSApplication
 from .i_mco_bundle import IMCOBundle