Workflow extension that doesn't run

I am attempting to create a workflow extension for BusinessAccountWorkflow.  It adds a few actions that I want to suppress. My extension’s Configure method override basically doesn’t do anything, so that the base method doesn’t create actions.  My override method doesn’t seem to be running, though, because the actions still appear, and my breakpoint isn’t hit. Below is the extension.  What could I be missing to get this to override to run?

public class BusinessAccountWorkflowExt : PXGraphExtension<BusinessAccountWorkflow, BusinessAccountMaint>
{
    public static bool IsActive() => false;

    public override void Configure(PXScreenConfiguration configuration)
    {
        var context = configuration
            .GetScreenConfigurationContext<BusinessAccountMaint, BAccount>();

        context.AddScreenConfigurationFor(screen =>
        {
            return screen;
        });

        //context.RemoveScreenConfigurationFor();
    }
}