Nice, if not a little late.
But more importantly, I don't think he said anything which requires forgiving. When Lennon said that the Beatles were bigger than Jesus, Lennon wasn't, as the Vatican claimed this weekend, "boasting". He was just stating a "fact" — perhaps an arguable one at the time — but certainly a supportable fact, to wit, the Beatles were more popular and "meant more" to teenagers in American than Jesus.
In my opinion, Lennon's assertion was true at the time. Why forgive someone who was speaking a truth?
P.S. White Album is 40 years old. "Revolution 9" hasn't grown on me, but the rest is still solid.