Remove globally visible check in __wt_checkpoint_close

    /*

     * If closing an unmodified file, check that no update is required for active readers.

     */

    if (!btree->modified && !bulk) {

        WT_RET(__wt_txn_update_oldest(session, WT_TXN_OLDEST_STRICT | WT_TXN_OLDEST_WAIT));

        return (__wt_txn_visible_all(session, btree->rec_max_txn, btree->rec_max_timestamp) ?

            __wt_evict_file(session, WT_SYNC_DISCARD) :

            EBUSY);

    }