[tidying] Remove windows extServerOptions.sc?

I’m wondering – is there any reason to keep SCClassLibrary/Platform/windows/extServerOptions.sc?

The comment in this file says “get options from command line passed by SCSpawn.exe,” but… does SCSpawn.exe even exist anymore? That sounds vaguely like something from the old Psycollider Windows port.

The only method defined in this file, setFromCmdString, appears nowhere else in the entire repository… so I’m guessing this could be deleted for the next release. But maybe I’m missing something.