Quite the leap there. Are you imagining billions dying off with no food and no further consumption while the AI overlords cruise about in their yachts between bunkers while zooming into Davos to cosplay as Davros and chuckle about the fate of the poors?
That aside, the earth land / sea layer is still lagging in its reaction the gigatonnes of CO2 already aloft .. which isn't going to magically disappear for some generations.
Even if AI destroys jobs there will still be fossil fuel consumption adding to the CO2 already there.