Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingCalculation.cs
===================================================================
diff -u -r638c0c354f63b4c8be69feb448712b004d8bb933 -rd320e912103d060e7a359846539a67dc54c616a4
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingCalculation.cs	(.../PipingCalculation.cs)	(revision 638c0c354f63b4c8be69feb448712b004d8bb933)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingCalculation.cs	(.../PipingCalculation.cs)	(revision d320e912103d060e7a359846539a67dc54c616a4)
@@ -22,7 +22,6 @@
 using System;
 using Core.Common.Base;
 using Ringtoets.Common.Data.FailureMechanism;
-using Ringtoets.Common.Placeholder;
 using Ringtoets.Piping.Data.Properties;
 
 namespace Ringtoets.Piping.Data