finding CSS for border around photos

I use k2 and had to reinstall everything last night to get 2.6 running with my theme.

In the process some CSS changes got made by the new install of K2. Now i wish to remove the blue borders around every linked photo, including my header photo. I scoured the css files and am somewhat experienced in customizing them, but couldn’t find any class to create those borders.

Any help is appreciated,

David Thomas
https://glitteringstew.con/reed