Manual:Validate table/pl

The validate table is not used in the MediaWiki 1.8 release, and can be safely deleted.

It was part of the since-archived, however, no core software needs it.

Schema summary
+--+--+--+-+-+---+ +--+--+--+-+-+---+ +--+--+--+-+-+---+
 * Field       | Type             | Null | Key | Default | Extra |
 * val_user    | int(11)          | NO   | MUL | 0       |       |
 * val_page    | int(11) unsigned | NO   |     | 0       |       |
 * val_revision | int(11) unsigned | NO  |     | 0       |       |
 * val_type    | int(11) unsigned | NO   |     | 0       |       |
 * val_value   | int(11)          | YES  |     | 0       |       |
 * val_comment | varchar(255)     | NO   |     |         |       |
 * val_ip      | varchar(20)      | NO   |     |         |       |