Delete standard shortcuts

So simple, but strange that is it not possible in Brave. You can CHECK the shortcuts Brave standards has. You can ADD for any shortcut a new shortcut you’d prefer. But you can’t DELETE the old one. For instance CMND-Y is to check history. Buy CMND-Y is also the mac’s shortcut for reverse undo (so reverse CMND-Z) - so the CMND-Y shortcut from mac interferes with the CMND-Y from Brave and is very annoying. And I cant delete it/change it. Very annoying and weird.