For what, it is important!
My client doesn't want it in their forum.
Hi, can you explain us the use case - why your client doesn't want likes in the forum? What's his motivation? It's crucial for us to understand in order to make any changes.
Yes, they want to have a discussion board without seeing a running tally of likes (& now comments) on the summary forum page. They also do not want to see the pop-up profile card that appears when you hover over the author name. If someone chooses to read the discussion it is is okay to see that information on the post page.