Remove margin and padding on image

Hi.

I am having an issue with the pictures and shortcode inserts on my side. There seems to be a top padding that I just can’t remove. I have done this to resolve the issue:

#content{ /*padding:0px 0;*/}
section{ /*padding:0px 0;*/}

It worked for two days and then stopped working.

You can see the issue with the padding between the picture and header here:
https://www.brandsite.dk/test/

Looking through the various stylesheets I have NOT been able to find a reference to an img padding or margin, that wasn’t 0px.

Does anyone have any clue as how to fix this?