How to quickly clean out old remaining references to "dead" form controls?

I have an app that has a rather large number of references to "dead" controls on a form. In other words, references to old TLabel's, TPanel's, TCheckboxes, etc that are not there anymore on the form. These obsolete controls however still remain in the Object Inspector, though the control no longer exists. Does anyone know of a "quick" way to clean all these old references out?

Thanks
    Shawn