Excel file tries to connect to internet links

Hello everybody.

I'm modifying an older file, created by somebody else and when I open it I keep getting 3 errors telling me that the web links it tries to open are not available. The problem is I've tried everything I could think of to find where/how those links are defined, but with no result.
The file doesn't seem to have any web query active, no links can be found as part of cell formulas...

A printscreen is attached below. Is there anyway I can get rid of this type of messages when opening this file?

Thanks!