dead issue

something that does not matter any more

A: are still mad at me about smoking?
B: no, that's a dead issue now.

dead issue by TheOmidM April 1, 2016

Dead the issue 

Let something go; forget about it

I kept telling her to leave ole dude alone but she wouldn’t listen so I had to dead the issue

Dead the issue by Yomommasbihh January 8, 2022