删除sqlsrv驱动的parseOrder方法

library/think/db/builder/Sqlsrv.php

@@ -23,17 +23,6 @@ class Sqlsrv extends Builder
     protected $updateSql       = 'UPDATE %TABLE% SET %SET% FROM %TABLE% %JOIN% %WHERE% %LIMIT% %LOCK%%COMMENT%';
     protected $deleteSql       = 'DELETE FROM %TABLE% %USING% %JOIN% %WHERE% %LIMIT% %LOCK%%COMMENT%';
 
-    /**
-     * order分析
-     * @access protected
-     * @param mixed $order
-     * @return string
-     */
-    protected function parseOrder($order)
-    {
-        return !empty($order) ? ' ORDER BY ' . $order : ' ORDER BY rand()';
-    }
-
     /**
      * 随机排序
      * @access protected