The Morning After Scene (the second of two deleted Tron/Yori scenes in the 1982 movie) has no audio, but there are definitely a few words spoken.
I’m not so good at lip reading. But I think they might be:
Yori: “You can go home now”
Tron (interrupting her): “I am home”
There’s a strange and beautiful mystery about those two scenes. It’s made clear (from “Not like home, is it?” in the first scene) that the two of them lived together before, somewhere else, somewhere better.
And Tron has this bittersweet duality, throughout both scenes, between a deep affection for Yori, and a brooding distance as he thinks about what else he needs to do.
In this scene, she sees him staring out at the I/O Tower where he needs to go, and that’s when she comes to him and has this moment of dialogue.
Perhaps she’s trying to acknowledge the restless and distracted side of him that is being called away somewhere else.
But he makes it clear he is fine with staying by her side a little while longer.
Afterwards the scene continues like this:
Someone I know says that in the script they both say “it’s time to go”… which is less sentimental but more obvious a thing to say, and looking at the video again I can see it being that, too.
Lip reading is a very inexact process.
But, then, almost every scene in this whole movie lends itself to several different fascinating interpretations in some way or another.