Removing Author and Date from Dyad Theme

I am using the Dyad theme and have used the following code to remove the author and date from posts:
.author {
display: none;
}

.entry-date {
display: none;
}

.single .byline, .group-blog .byline {
display: none;
}

But this leaves behind the word “on” that was between the author and date. How can I remove this?

https://www.ads-software.com/plugins/css/