Deleted 2 old and low rated notes

Following were the 2 notes with a rating less than -5 and
are older than 1 year.

These notes represented 0.0% of the 15872 total user notes,
and have now been removed.

Rating | Note
-------+---------------------------------------------------------
   -6  | https://php.net/manual/en/function.popen.php#40535
   -6  | https://php.net/manual/en/function.file-exists.php#84918