I would like to remove the pretty photo light box from the front page portfolio section.
I would assume I would have to edit the code in mt-custom-hooks.php?
if so what would be the correct line to remove? Also I am trying to implement this in a child theme so any help as to if I just copy edited file to child theme folder or add function in child themes functions.php

if ( ! function_exists( 'fotogenic_homepage_portfolio_sec' ) ) :

/*
 * Frontpage masonry section function
 *
 */

function fotogenic_homepage_portfolio_sec() {

	$fotogenic_cat_name = get_theme_mod( 'frontpage_portfolio_category_select_setting' );

	if ( empty( $fotogenic_cat_name ) ) {
		return;
	}
?>

	<!-- mt-fotogenic-masonry-section -->
	<section class="mt-fotogenic-masonry-wrap">
		<?php $fotogenic_portfolio_title = get_theme_mod( 'frontpage_portfolio_title_setting' ); 
		if (  !empty ( $fotogenic_portfolio_title ) ) { ?>
			<h2 class="section-title"><?php echo esc_html( $fotogenic_portfolio_title ); ?></h2>
		<?php }

		$frontpage_portfolio_sub_title_setting = get_theme_mod( 'frontpage_portfolio_sub_title_setting', '' );
		if ( !empty( $frontpage_portfolio_sub_title_setting ) ) {
			echo '<div class="section-sub-title">'.esc_html( $frontpage_portfolio_sub_title_setting ).'</div>';
		} ?>

		<div class="fotogenic_masonry_images">
			<?php
				$portfolio_count = apply_filters( 'fotogenic_portfolio_count', 9 );
				$fotogenic_portfolio_posts = new WP_Query( array( 
						'category_name' 	=> esc_attr( $fotogenic_cat_name ),
						'posts_per_page' 	=> absint( $portfolio_count ),
						'order_by' 			=> 'date',
						'order' 			=> 'ASC'
					)
				);  

				if ( $fotogenic_portfolio_posts -> have_posts() ) :
					while( $fotogenic_portfolio_posts -> have_posts() ) : $fotogenic_portfolio_posts -> the_post(); ?>

						<div class="masonry_item">
							 <?php if ( get_the_post_thumbnail_url() != " " ) { ?>
									<a href="<?php echo esc_url(get_the_post_thumbnail_url()); ?>" rel="prettyPhoto">
										<img src="<?php echo esc_url(get_the_post_thumbnail_url()); ?>">
									</a>
									<div class="masonry-content-wrapper">
										<h2 class="masonry_title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
										<div class="masonary_excerpt"> <?php the_excerpt(); ?> </div>
									</div> <!-- masonry-content-wrapper -->
							<?php } ?>
						</div>

			<?php endwhile; wp_reset_postdata(); endif; ?>	

		</div>
		<?php 
			$section_button_url = get_theme_mod( 'frontpage_portfolio_button_url_setting' ); 
			$section_button_label = get_theme_mod( 'frontpage_portfolio_botton_label_setting' );
			if ( !empty ( $section_button_label ) ) { ?>
				<div class="masonary-view-all-btn">
					<a class="hero_image_btn" href="<?php echo esc_url( $section_button_url ); ?>"><?php echo esc_html( $section_button_label ); ?></a>
				</div>
		<?php } ?>

	</section>

<?php }

endif;