Hi there,
open part-social-sharing.php and replace all with
<?php if( in_the_loop() ): ?>
<ul class="socials">
<?php
$thumb_id = get_post_thumbnail_id();
$target = '';
if ( get_theme_mod( 'social_target', 1 ) == 1 ) {
$target = 'target="_blank"';
}
$facebook = add_query_arg( array(
'u' => get_permalink(),
), 'https://www.facebook.com/sharer.php' );
$twitter = add_query_arg( array(
'url' => get_permalink(),
), 'https://twitter.com/share' );
$pinterest = add_query_arg( array(
'url' => get_permalink(),
'description' => get_the_title(),
'media' => olsen_get_image_src( get_post_thumbnail_id(), 'large' ),
), 'https://pinterest.com/pin/create/bookmarklet/' );
?>
<li><a rel="nofollow" href="<?php echo esc_url( $facebook ); ?>" <?php echo $target; ?> class="social-icon"><i class="fa fa-facebook"></i></a></li>
<li><a rel="nofollow" href="<?php echo esc_url( $twitter ); ?>" <?php echo $target; ?> class="social-icon"><i class="fa fa-twitter"></i></a></li>
<?php if ( ! empty( $thumb_id ) ): ?>
<li rel="nofollow"><a href="<?php echo esc_url( $pinterest ); ?>" <?php echo $target; ?> class="social-icon"><i class="fa fa-pinterest"></i></a></li>
<?php endif; ?>
</ul>
<?php endif; ?>
Pinterest will only appear if you have a featured image https://www.wpbeginner.com/glossary/featured-image/.
If you decide to proceed with this modification I would suggest you create a child theme, copy over the files you are editing and make the modifications there. This will allow your changes to survive future theme updates. If you directly edit the theme’s files, all changes will be lost once you update.
Have a look at this guide to learn more about child themes and how to create one https://www.cssigniter.com/ignite/beginners-guide-child-themes/
Let me know if you need additional help with this.