If you mean delete it from add-on lists in Admin CP I already done that,if you don't mean that how can I delete it other way?You might need to uninstall it from the Admin CP.
It should remove the column in the database that is causing the issue.
Then ask Luke Foreman for support in the discussion thread here: http://xenforo.com/community/resources/taigachat-pro-realtime-chat-shoutbox.1224/
I just upload taigachat pro ...
http://puu.sh/1WgNa I upgraded to 1.1.3 still same problem,what do you advice to me?You're running XF 1.1.2 so I recommend uploading all of the files from XF 1.1.3 (the latest version) and running the upgrade process again.