Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionBoundaryCalculationActivity.cs
===================================================================
diff -u -rb633ec894f0b9c1878e978b24a0c870480fd604b -r22b6bdeb7d18ce2492b61394783e0a93257859a7
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionBoundaryCalculationActivity.cs	(.../DuneErosionBoundaryCalculationActivity.cs)	(revision b633ec894f0b9c1878e978b24a0c870480fd604b)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionBoundaryCalculationActivity.cs	(.../DuneErosionBoundaryCalculationActivity.cs)	(revision 22b6bdeb7d18ce2492b61394783e0a93257859a7)
@@ -33,7 +33,6 @@
     public class DuneErosionBoundaryCalculationActivity : HydraRingActivityBase
     {
         private readonly DuneLocation duneLocation;
-        private readonly DuneErosionFailureMechanism failureMechanism;
         private readonly string hydraulicBoundaryDatabaseFilePath;
         private readonly double norm;
         private readonly DuneErosionBoundaryCalculationService calculationService;
@@ -42,29 +41,20 @@
         /// Creates a new instance of <see cref="DuneErosionBoundaryCalculationActivity"/>.
         /// </summary>
         /// <param name="duneLocation">The <see cref="DuneLocation"/> to perform the calculation for.</param>
-        /// <param name="failureMechanism">The <see cref="DuneErosionFailureMechanism"/> that holds 
-        /// information about the contribution and the general inputs used in the calculation.</param>
         /// <param name="hydraulicBoundaryDatabaseFilePath">The hydraulic boundary database file that 
         /// should be used for performing the calculation.</param>
         /// <param name="norm">The norm to use during the calculation.</param>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="duneLocation"/> or
-        /// <paramref name="failureMechanism"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="duneLocation"/> is <c>null</c>.</exception>
         public DuneErosionBoundaryCalculationActivity(DuneLocation duneLocation,
-                                                      DuneErosionFailureMechanism failureMechanism,
                                                       string hydraulicBoundaryDatabaseFilePath,
                                                       double norm)
         {
             if (duneLocation == null)
             {
                 throw new ArgumentNullException(nameof(duneLocation));
             }
-            if (failureMechanism == null)
-            {
-                throw new ArgumentNullException(nameof(failureMechanism));
-            }
 
             this.duneLocation = duneLocation;
-            this.failureMechanism = failureMechanism;
             this.hydraulicBoundaryDatabaseFilePath = hydraulicBoundaryDatabaseFilePath;
             this.norm = norm;
 
@@ -90,7 +80,6 @@
             if (State != ActivityState.Skipped)
             {
                 calculationService.Calculate(duneLocation,
-                                             failureMechanism,
                                              norm,
                                              hydraulicBoundaryDatabaseFilePath);
             }