CSS to hide the Activity or Messages tabs on the group detail page

Product Support
2

It’s a bit clunky, but something like:

div.container.group.YourGroupNameSlug > div.list-controls > div.container > ul >  li {
     a.messages.ember-view, a.activity.ember-view {
        visibility: hidden; 
     }
}

Should work, the group slug is specified in line one.