Update qb.sql

plugins/qbittorrent/conf/qb.sql

@@ -17,6 +17,5 @@ CREATE TABLE `pl_hash_file` (
   `length` bigint(20) NOT NULL,
   `create_time` datetime NOT NULL,
   PRIMARY KEY (`id`),
-  UNIQUE KEY `info_hash` (`info_hash`),
   KEY `create_time` (`create_time`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8;