How do I remove a filter I've applied to a Sprite?

Is there any way to remove a filter that’s been applied to a sprite?

Let’s say I have a sprite named rect, and I’ve applied three filters to it:

var dS:DropShadowFilter = new DropShadowFilter();
var gF:GlowFilter = new GlowFilter();
var blF:BlurFilter = new BlurFilter();
rect.filters =[bF, gF, blF];

How can I remove those filters, and return rect to it’s original unfiltered state?