Hello,
I am not 100% sure where its coming from since its a 3rd party module but the DIV in question is #cbfr_24 {
You probably wouldn't want to remove the div completely as it is part of the output for Connections (0) but you can just override it to have no background and appear like the other one with this added to the custom.css file.
#cbfr_24 {
background: none !important;}