Hello @marketing123,
Simplest, Although never advised, way to get/update your required feature is edit this file /public_html/wp-content/plugins/so-masonry/tpl/masonry.php and comment out as in
<!--<div class="entry-meta">
<?php
printf( __( 'Posted on <a href="%1$s" title="%2$s" rel="bookmark" target="_blank"><time class="entry-date" datetime="%3$s">%4$s</time></a><span class="byline"> by <span class="author vcard"><a class="url fn n" href="%5$s" title="%6$s" rel="author">%7$s</a></span></span>', 'so-masonry' ),
esc_url( get_post_meta( get_the_ID(), 'website_url', true ) ),
esc_attr( get_the_time() ),
esc_attr( get_the_date( 'c' ) ),
esc_html( get_the_date() ),
esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
esc_attr( sprintf( __( 'View all posts by %s', 'so-masonry' ), get_the_author() ) ),
get_the_author()
);
?>
</div><!-- .entry-meta -->
