Needless warning DROP-ing non-existant tables.

MariaDB [test]> drop table if exists cs1,cs2;

Query OK, 0 rows affected, 1 warning (0.067 sec)

MariaDB [test]> show warnings;

+-------+------+-----------------------------------+

| Level | Code | Message                           |

+-------+------+-----------------------------------+

| Note  | 1051 | Unknown table 'test.cs1,test.cs2' |

+-------+------+-----------------------------------+