It seems the height of the mood area is coded into the page. I tested this with Stylish overriding your layout and it worked.
Find .currentmood in the style. It'll be by itself, and will have height: 18px; in it. Remove that portion, and the mood images should automatically determine the height of your mood field. If that doesn't work, replace the height line with height: auto !important;
I found that it left things looking a bit out of alignment, so I would personally suggest adding this bit as well to move the word 'mood' back up to the top.
.currentmood strong { vertical-align: top !important; }
If you'd still rather remove mood images for whatever reason, use this:
.currentmood img { display: none !important; }
You can also add various styles (padding, borders, etc.) to the mood images in that section if you'd prefer to style them instead of removing them completely.