davjor Hi
Quickest way would be to add module suffix as seen in screenshot in specific module which is assigned and then add this at end of custom.css file :
.no-title .latestnews.list h3, .no-title .latestnews.list .article-field{display:none !Important;}
You may also which to see this walkthrough for building demo pages
Where can I find the Alternative layout "list" which is used in JA Conf?
The module being used is Articles - Latest type which shows a list of the most recently published and current Articles and the category from which articles are being fetched is speaker as shown in demo site