I just discovered this trick though. In the search bar simply type "-" and the person's name sharing the multiple files. Everything they have shared with you disappears from the list. You can even type several names if you are trying to de-clutter even more.
I love that information is being shared to tailor education, sometimes I just need it out of the way in order to find the sheet I am currently needing.
The best part is that nothing is actually deleted, just hidden temporarily.
|By subtracting certain owners, their shared documents are temporarily hidden.|