Is there a way to remove items from this list?  I've only browsed a few games and they are all showing up in this section.

I can't seem to find a way to remove them.
I have 2 I want to keep, as I'm active in them.
This message had punctuation tweaked by the user at 21:15, Mon 07 May 2018.

Click the little minus symbol to the left of the GM's name, which will remove them from the list.