Macworld We here at Macworld used to complain that the MacBook lineup was too complicated, but Apple has now simplified it so it makes more sense. But what if Apple had gone even further–what if there was only one laptop line, the MacBook Pro, and nothing else? That’s what former Apple design guru Jony Ive wanted to do, according to journalist Walt Mossberg. In a recent episode of The Vergecast podcast, Mossberg talks about one of the ideas that Ive had while working with Tim Cook at Apple. (It’s at the 27:00 mark of the show.) Ive wanted to whittle down the MacBook lineup to one model, the Ma…