Remove author and date from post in Rumour

Hello. I'm using the Rumour template and I want to remove the author name and date from my posts:

But I can't. I've checked that the Blog element has them deactivated. If I try to activate them it looks like this:

So it's controlled by something else. In the code, these are the lines that output the author and date:
<span class="byline"><span class="author vcard" itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><span class="author-name" itemprop="name">admin</span></span></span>
<span class="posted-on"><time class="entry-date published" datetime="2019-12-03T11:28:55+03:00" itemprop="datePublished">03.12.2019</time></span>

How do I stop this code from running? Thanks.