Removing "By" from author byline

Hi there,

Give this function a try:

add_filter( 'generate_post_author_output', 'tu_remove_by_byline' );
function tu_remove_by_byline() {
	printf( ' <span class="byline">%1$s</span>', // WPCS: XSS ok, sanitization ok.
		sprintf( '<span class="author vcard" itemtype="https://schema.org/Person" itemscope="itemscope" itemprop="author"><a class="url fn n" href="%1$s" title="%2$s" rel="author" itemprop="url"><span class="author-name" itemprop="name">%3$s</span></a></span>',
			esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
			/* translators: 1: Author name */
			esc_attr( sprintf( __( 'View all posts by %s', 'generatepress' ), get_the_author() ) ),
			esc_html( get_the_author() )
		)
	);
}

Thanks
Very good, that works :-)

I still have one request:
From site library I loaded FlixFrame "Blogg".
How to separate a date and author with a vertical bar.
I would like to keep the style like in the example from FlixFrame "Blogg"

Try this CSS:

.author:before {
    content: "| ";
}

Thanks a lot!

You're welcome :)