Is the driver's remove not python?

Hi, We want to use a python script to remove the driver. Is there any better way?
The idea is to manually select the shape key and> remove the driver.
So I wondered if there is an API for deleting the driver, but even if the driver is deleted in the information window, nothing is displayed. =(

does anyone know it?

ok, we checked by ourselves and found the answer.
But we switched to another method.