Removing coupon from cart

Hi,
I am using your awocoupon (free) on Joomla! 2.5.6 and Virtuemart 2.0.6. I have a situation where I need to remove the coupon which was earlier applied to the cart. I looked at the code but did not find anything. How can I achieve this?

Thanks in advance!

this is really a virtuemart function rather than awocoupon. If you are testing and just need to remove the coupon from the cart, then you could empty the shopping cart. This will remove the coupon code.