How to Remove Feature Image from Post ? Code in the description.

I am using the theme Dynamic News Lite, I have tried many way to remove feature image from appearing in the post, I only need it as a thumbnail for my recent post.

I try to check my single.php to remove some code, try to hide it with css but nothing seems to work, I did find this code in my template-tags, if you guys can take a look at it I would appreciate it.

// Display Site Title
add_action( 'dynamicnews_site_title', 'dynamicnews_display_site_title' );

function dynamicnews_display_site_title() { ?>

	<a href="<?php echo esc_url(home_url('/')); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home">
		<h1 class="site-title"><?php bloginfo('name'); ?></h1>
	</a>

<?php
}

// Display Custom Header
if ( ! function_exists( 'dynamicnews_display_custom_header' ) ):

	function dynamicnews_display_custom_header() {

		// Check if page is displayed and featured header image is used
		if( is_page() && has_post_thumbnail() ) :
		?>
			<div id="custom-header" class="featured-image-header">
				<?php the_post_thumbnail('custom_header_image'); ?>
			</div>
<?php
		// Check if there is a custom header image
		elseif( get_header_image() ) :
		?>
			<div id="custom-header">
				<img src="<?php echo get_header_image(); ?>" />
			</div>
<?php
		endif;

	}

endif;

// Display Postmeta Data
if ( ! function_exists( 'dynamicnews_display_postmeta' ) ):

	function dynamicnews_display_postmeta() {

		// Get Theme Options from Database
		$theme_options = dynamicnews_theme_options();

		// Display Date unless user has deactivated it via settings
		if ( isset($theme_options['meta_date']) and $theme_options['meta_date'] == true ) : ?>

			<span class="meta-date sep">
			<?php printf(__('<a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date published updated" datetime="%3$s">%4$s</time></a>', 'dynamicnewslite'),
					esc_url( get_permalink() ),
					esc_attr( get_the_time() ),
					esc_attr( get_the_date( 'c' ) ),
					esc_html( get_the_date() )
				);
			?>
			</span>

		<?php endif;

many thanks