Remove data from blog post entries

Hi
I’ve tried different CSS to remove the post date from the post entries page.

Here’s what I tried as found in this ticket (https://kriesi.at/support/topic/remove-date-from-blog-grid-layout-and-search-results/#post-1095287)

.avia-content-slider .slide-meta time {
display: none;
}
The date still shows not matter what I try.

This is the page that list the blog entries on staging server: http://crescendo.staging.wpengine.com/activites/ (hosted on WPengine)

I’m on a dead to launch the blog at the end of the week, so would appreciate a quick soltuion.
Thank you
Lyse