The Virtue theme doesn’t use the .entry-meta class. It’s all wrapped up in a div with the class “subhead”. It looks like this:
<div class="subhead">
<span class="postauthortop author vcard">
<i class="icon-user"></i> by <span itemprop="author"><a rel="author" class="fn" href="https://site.com/author/author/">author name</a></span> |</span>
<span class="postedintop"><i class="icon-folder-open"></i> posted in: <a rel="category tag" href="https://site.com/category/uncategorized/">Uncategorized</a></span> <span class="kad-hidepostedin">|</span>
<span class="postcommentscount">
<i class="icon-comments-alt"></i> 0 </span>
</div>
I’m not sure changing the css to hide something called “subhead” is a good idea, to put it mildly. You might have to hide .postauthortop, .postedintop and .postcommentscount.
.postauthortop, .postedintop, .postcommentscount, .kad-hidepostedin {
display:none !important;
}
But in any event, don’t modify the css files unless you’re working in a child theme. Virtue has been updated at least 11 times just this year, and each time your css changes would have been nuked.
The customizer for this theme has a section for Advanced Settings, which has a box for custom css. Put your code there and it will stick through any future upgrades.