I am deleting a mop sink in the laundry room. I need to cap everything off inside the wall.?

There are two copper water supply lines that will be capped. My question is about the PVC vent going up. This is on the first floor. I am assuming it ties into another vent befor hitting the sky. Currently, there is a tee that comes out of the wall for the sink drain. Below the tee there is a cleanout coming out of the wall that I will keep. Can I cut out the tee, cap the bottom section above the cleanout, and leave the vent pipe above the tee open. Should I cap the vent pipe on the top. Thanks.

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