Remove a button widget to the button list of the selected Radio button group. The function makes sure the radio button grp is valid and the button widget to be removed is a part of the group. The button is then removed properly making sure to handle the list correctly. If the list size is 0, the group is destroyed.

LIB_EXPORT leResult leRadioButtonGroup_RemoveButton(
    leRadioButtonGroup* grp, 
    leRadioButtonWidget* btn
);

leResult