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 16720 total user notes,
and have now been removed.

Rating | Note
-------+---------------------------------------------------------
   -7  | https://php.net/manual/en/control-structures.goto.php#128865
   -6  | https://php.net/manual/en/function.pg-connect.php#34836
   -6  | https://php.net/manual/en/function.str-pad.php#55674
   -6  | https://php.net/manual/en/reserved.variables.server.php#93046