Hide icon in modal dialog on windows

I just started working on the bug https://github.com/electron/electron/issues/22105.
I am rather new here and am having trouble with navigating to the files that I would need to change to fix it, but based on the source code directory structure, and I think it would be in the shell/api - browser window in the electron directory.
It would be helpful if anyone can tell what files I might be working.
Thanks in advance.