Remove featured image from post!

Hi! I have been trying to figure this out all weekend with no success.

I want my featured image to display as a thumbnail on my home page but NOT in my single posts. I have been told to edit my single.php but there is not much code in it. I’m using a child of twenty twelve.

Here is my website:

https://betterhousekeeper.com/

Here is a link to the thumbnail showing over the title of the post (want this removed):

https://betterhousekeeper.com/2014/02/23/apple-green-springs-hottest-hue/

Single.php file:

<?php
/**
* The Template for displaying all single posts
*
* @package WordPress
* @subpackage Twenty_Twelve
* @since Twenty Twelve 1.0
*/

get_header(); ?>

<div id=”primary” class=”site-content”>
<div id=”content” role=”main”>

<?php while ( have_posts() ) : the_post(); ?>

<?php get_template_part( ‘content’, get_post_format() ); ?>

<nav class=”nav-single”>
<h3 class=”assistive-text”><?php _e( ‘Post navigation’, ‘twentytwelve’ ); ?></h3>
<span class=”nav-previous”><?php previous_post_link( ‘%link’, ‘<span class=”meta-nav”>’ . _x( ‘←’, ‘Previous post link’, ‘twentytwelve’ ) . ‘</span> %title’ ); ?></span>
<span class=”nav-next”><?php next_post_link( ‘%link’, ‘%title <span class=”meta-nav”>’ . _x( ‘→’, ‘Next post link’, ‘twentytwelve’ ) . ‘</span>’ ); ?></span>
</nav><!– .nav-single –>

<?php comments_template( ”, true ); ?>

<?php endwhile; // end of the loop. ?>

</div><!– #content –>
</div><!– #primary –>

<?php get_sidebar(); ?>
<?php get_footer(); ?>