Web - How to remove confirmations message

C#
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.SystemModule;
using DevExpress.ExpressApp.Web.SystemModule;
using dxT336681.Module.BusinessObjects;

namespace dxT336681.Module.Web.Controllers {
    public class CustomWebController : ObjectViewController<DetailView,Contact> {
        private const string myKey = "Can't Save";
        protected override void OnActivated() {
            base.OnActivated();
            Frame.GetController<ModificationsController>().SaveAction.Active.SetItemValue(myKey, false);
            Frame.GetController<ModificationsController>().SaveAndNewAction.Active.SetItemValue(myKey, false);
            Frame.GetController<ModificationsController>().SaveAndCloseAction.Active.SetItemValue(myKey, false);
            Frame.GetController<ModificationsController>().ModificationsHandlingMode = ModificationsHandlingMode.AutoRollback;
            changesController = Frame.GetController<WebConfirmUnsavedChangesDetailViewController>();
            if(changesController != null) {
                changesController.Active[myKey] = false;
            }
        }
        WebConfirmUnsavedChangesDetailViewController changesController;
        protected override void OnDeactivated() {
            if(changesController != null) {
                changesController.Active.RemoveItem(myKey);
            }
            base.OnDeactivated();
        }
    }
}

Visual Basic
Imports DevExpress.ExpressApp
Imports DevExpress.ExpressApp.SystemModule
Imports DevExpress.ExpressApp.Web.SystemModule
Imports DevExpress.Persistent.BaseImpl

Namespace dxT336681.Web.Controllers
    Public Class CustomWebController
        Inherits ObjectViewController(Of DetailView, Person)

        Private Const myKey As String = "Can't Save"

        Protected Overrides Sub OnActivated()
            MyBase.OnActivated()
            Frame.GetController(Of ModificationsController)().SaveAction.Active.SetItemValue(myKey, False)
            Frame.GetController(Of ModificationsController)().SaveAndNewAction.Active.SetItemValue(myKey, False)
            Frame.GetController(Of ModificationsController)().SaveAndCloseAction.Active.SetItemValue(myKey, False)
            Frame.GetController(Of ModificationsController)().ModificationsHandlingMode = ModificationsHandlingMode.AutoRollback
            changesController = Frame.GetController(Of WebConfirmUnsavedChangesDetailViewController)()

            If changesController IsNot Nothing Then
                changesController.Active(myKey) = False
            End If
        End Sub

        Private changesController As WebConfirmUnsavedChangesDetailViewController

        Protected Overrides Sub OnDeactivated()
            If changesController IsNot Nothing Then
                changesController.Active.RemoveItem(myKey)
            End If

            MyBase.OnDeactivated()
        End Sub
    End Class
End Namespace