Removing Author area from bottom

First, create a child theme to hold all the changes.
https://codex.www.ads-software.com/Child_Themes

Once child theme is activated and working, create a blank php file with this name loop-entry-author.php in child theme folder.

Or overwrite singular.php and comment out the get_template_part( 'loop', 'entry-author' );

Or hide it using CSS

.entry-author-meta { display: none; }