Code:
set allRadiobuttons=browser().Page()....childobjects("WebRadioButton")
allRadiobuttons(<index of the radio button to delete>).setif you dont know the index and in this case as you said above if you want to delete last radio button then
Code:
allRadiobuttons(Ubound(allRadiobuttons)).SetIf you are already doing it this way or it this doesn't help , pls post your code and object spy snapshot of the radio button to be deleted.

