I hate babys, ive got more important things to do than look after it every 2mins thanks.
Sorry Chris there is no way of killing the baby and keeping the adult.
Looking after the baby on it's first hour, I agree is very demanding, but at least with V2's and V3's you can use the pause button if you have to do something else, and come back to it when you do have time. It is only an hour, and even if there was a way to get rid of it- you can't keep an adult forever. Even resetting will mean starting over with a baby.
The pot plant does sometimes have an angry face with fangs- and scares the tama-but it doesn't eat the baby. Nor does it drop happiness hearts.