Hide date and comments on blog preview

Hi,

where can I edit the blog entries, hidden date and hidden comments?
I found this answer:
https://kriesi.at/support/topic/hide-date-and-time-in-blog-posts/

So I put in “Enfold –> allgemeines Styling –> quick css:

.entry-content .post-meta-infos {
display: none;
}

but it doesn’t work. What to do?
Best regards
wolfgang

Here ist the site:
http://www.wegezurklarheit.com/category/blog/