win32: backout 1a9ebc83a74c This change conflicted with TortoiseHg's use of QFileSystemWatcher. Files which were being monitored (for file-system events) were unable to be reliably updated using util.atomictempfile. Often the update would error out in the middle of the process leaving neither the old or the new file in place. My guess is that _kernel32.CreateFileA() is triggering an exception that is not handled correctly within unlink()