How to remove author name on posts?

Possibly the easiest option is just hiding those links via some custom CSS, like this:

.post_meta .posted_by {
    display: none;
}

You could also remove the following line (which can be found in the single.php and content.php templates):

<li class="posted_by"><span class="glyphicon glyphicon-user"></span><span><?php _e( 'by&nbsp;', 'one-page' ); ?></span><?php the_author_posts_link(); ?></li>

Modifying a theme’s code directly like this is never a great idea, but you could safely copy those templates over to a child theme and make the change there.

Hope that helps!

It’s not working for me. I have tried to hide author name from first post page even single post page. I have tried using that code but is not working.