Deleted 4 old and low rated notes

Following were the 4 notes with a rating less than -5 and
are older than 1 year.

These notes represented 0.0% of the 16385 total user notes,
and have now been removed.

Rating | Note
-------+---------------------------------------------------------
   -6  | https://php.net/manual/en/function.mt-rand.php#128105
   -6  | https://php.net/manual/en/function.socket-select.php#25054
   -6  | https://php.net/manual/en/ini.core.php#118942
   -6  | https://php.net/manual/en/intl.installation.php#128328