BoldGrid child theme removing "Posted On Date" from posts

functions.php

<?php
/**
 * Prints HTML with meta information for the current post-date/time and author.
 *
 * @see: https://www.boldgrid.com/support/question/in-the-blog-how-can-i-remove-the-posted-on-date-text/
 */
function boldgrid_posted_on() {
	if ( is_archive() ) {
		return;
	}

	$time_string = '<time class="entry-date published updated" datetime="%1$s">%2$s</time>';
	if ( get_the_time( 'U' ) !== get_the_modified_time( 'U' ) ) {
		$time_string = '<time class="entry-date published" datetime="%1$s">%2$s</time><time class="updated" datetime="%3$s">%4$s</time>';
	}

	$time_string = sprintf( $time_string,
		esc_attr( get_the_date( 'c' ) ),
		esc_html( get_the_date() ),
		esc_attr( get_the_modified_date( 'c' ) ),
		esc_html( get_the_modified_date() )
	);

	$posted_on = sprintf(
		_x( 'Posted on %s', 'post date', 'bgtfw' ),
		'<a href="' . esc_url( get_permalink() ) . '" rel="bookmark">' . $time_string . '</a>'
	);

	$byline = sprintf(
		_x( 'by %s', 'post author', 'bgtfw' ),
		'<span class="author vcard"><a class="url fn n" href="' . esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ) . '">' . esc_html( get_the_author() ) . '</a></span>'
	);

	echo '<span class="posted-on">' . $posted_on . '</span><span class="byline"> ' . $byline . '</span>';

}