I'm clearing off space from my 256GB internal hard disk using DaisyDisk. I've come across a 3GB hidden folder called ".stack" in my home directory. I can't remember whether I ever had an application called "stack" -- a short Google search only came up with Apple's Stacks.
Is this a MacOS or system folder which I should leave alone, or is it fine to delete it? If there's any doubt, I'll leave it be, but otherwise 3GB is space I could use. This is the content of the folder -- it seems to be a few years old.
(For what it's worth, I'm running 10.14.6).