Deleted 6 old and low rated notes

Following were the 6 notes with a rating less than -5 and
are older than 1 year.

These notes represented 0.0% of the 15901 total user notes,
and have now been removed.

Rating | Note
-------+---------------------------------------------------------
   -6  | https://php.net/manual/en/function.parse-url.php#122446
   -6  | https://php.net/manual/en/ini.core.php#125951
   -6  | https://php.net/manual/en/mysqli-stmt.close.php#60815
   -6  | https://php.net/manual/en/curl.installation.php#122370
   -6  | https://php.net/manual/en/intl.installation.php#112210
   -6  | https://php.net/manual/en/language.namespaces.importing.php#125337