Author name and links can be hidden in all WordPress posts on your site, by editing the default CSS Stylesheet, and adding the following to it:
.author {
display: none;
}
Go to Appearance > Edit CSS, and you will be taken to CSS Stylesheet Editor.
Default CSS Stylesheet for Twenty Sixteen theme should look like this.
/* Welcome to Custom CSS! To learn how this works, see http://wp.me/PEmnE-Bt */
It should look something like this, after you add the snippet to hide name and link of the site account used to make the post.
/*
/*
Welcome to Custom CSS!
To learn how this works, see http://wp.me/PEmnE-Bt
*/
/* Remove posting account links from all posts*/
.author {
display: none;
}
Source:
https://en.forums.wordpress.com/topic/can-i-remove-author-in-all-my-posts