Why is it that there's no way to remove inputs/outputs from custom functions?

A hell of a week it was. Yea i wasn’t intending on posting about it, as I was sure there was no way anyway, and it seemed counter productive to do so. But after a week of deleting and recreating functions every time I had to change the pins it got annoying. The reason I didn’t think to pull the bar out is that although the X’s move with it, the Pluses don’t lol. Just a dumb mistake