Macro to delete balloons

I'm trying to figure out a way to delete all the balloons in a drawing.  I need to Rev a bunch of drawings and need to delete all of the circular balloons we use on every sheet.

I couldn't find anything in the API help that would allow me to delete a balloon.

If anyone has any has any information on this, or a quick and dirty macro I can modify that would be great.

Thanks,

Jason

SolidworksApi macros