diff --git a/src/mlpro/bf/control/controllers/pid_controller.py b/src/mlpro/bf/control/controllers/pid_controller.py
index 04890854b..f43678d71 100644
--- a/src/mlpro/bf/control/controllers/pid_controller.py
+++ b/src/mlpro/bf/control/controllers/pid_controller.py
@@ -20,13 +20,9 @@
 
 """
 
-from mlpro.bf.math.basics import Log,Set
 from mlpro.bf.mt import Log, Task
-from mlpro.bf.systems import Action
 from mlpro.bf.control.basics import ControlError, Controller
 from mlpro.bf.systems.basics import ActionElement
-from mlpro.bf.various import Log
-from datetime import datetime, timedelta
 import numpy as np