Well they did omit Obi Wan's longer narrative that mentioned More about Anakin, and that Owen Lars was his brother.
It is in the novelization though i doubt it was ever filmed, i am not even sure it made its way into the shooting script.
I do know it was something Lucas, Kasdan and Marquand talked about in the sessions where they worked on the story.
Hopefully the transcriptions of those verbal story brainstorm sessions will be on the book by rinzler on ROTJ.