Hide images and links in footer

I am going absolutely crazy. On education.macsupport.se I have a twitter feed in the footer. I want to hide the images and links to make the feed more compact

I have tried to add the following code to the editor as well as to the Enfold theme settings/general styling. I have cleared the CDN and cache but I still can’t get the stuff to disappear. If I use Firebug or similar I can make them go away, but not on the actual site. I suspect that there might be something wrong with the specificity/cascade, but I can’t for the life in me get this simple css hack to work.

.u-block {
display: none !important;
}

li.timeline-Tweet-actions {
display: none !important;
}

What am I doing wrong?