When I do it, it asks nothing, as I have delete-by-moving-to-trash.

I just checked and that appears to be my situation as well. I don’t know if Graphene set that variable or some other package (as Graphene uses an amalgamation), but delete-by-moving-to-trash is ’t’ for me and it indeeds asks nothing. I’d still expect it to prompt, but never even considered looking in the Trash… (running on Mac platform)

It is good to remove the malfunction from key bindings. Better is to
remove it completely.

+1 on removing it completely. That’s a dangerous binding considering it’s typically “cut to end of line”.