What happened to Leguna Seca and Donnington?

I'm newish to the sport, I would watch the odd race as a kid but last year I got my own bike and got into GP as well. After playing the game I'm wondering what happened to these tracks

I'm newish to the sport, I would watch the odd race as a kid but last year I got my own bike and got into GP as well. After playing the game I'm wondering what happened to these tracks http://ifttt.com/images/no_image_card.png