db_maintenance_log is not being honored

There is an extra logging statement that is being run that does not check the status of the db_maintenance_log configuration option.

watchdog('db_maintenance', 'Optimized @table table in @db database.', array('@db' => $db_name, '@table' => $table_name), WATCHDOG_DEBUG);

This can be completely removed because a few lines down there's another watchdog that does check this config option that logs the same information as a single message.