Hide tags from navigation menu on the left

I want to make it invisible in the circle.
can you help?

.Dropdown-menu .item-tags{display:none;}

You can see it in action in my forum at https://moccato.de

In my case it's

.sideNav .Dropdown-menu > li.item-tags {
    display: none !important;
}

It's somewhat more specific, but I guess that's not necessary. @Leanna's solution might suffice.