Google’s John Mueller had a lot to say this morning, he said basically, you should only disavow links when they are really problematic. If they are not relevant anymore, that is not a reason to disavow those links.
John was presented with the question at 8:20 mark into the Google Hangout on Google+. The question was:
John said no, add those links back. He said:
So don’t disavow links that you earned and are real.
Here is the video embed:
Forum discussion at Google+.