Disable the Blog Sidebar ONLY on Single Posts

1single.php

<?php FLTheme::sidebar('left'); ?>
		
	<div class="fl-content <?php FLTheme::content_class(); ?>">
		<?php if(have_posts()) : while(have_posts()) : the_post(); ?>
			<?php get_template_part('content', 'single'); ?>
		<?php endwhile; endif; ?>
	</div>

<?php FLTheme::sidebar('right'); ?>

1style.css

/** Force full width layout on single posts only */
add_filter( 'genesis_pre_get_option_site_layout', 'bb_full_width_layout_single_posts' );
function bb_full_width_layout_single_posts( $opt ) {
if ( is_single() ) {
    $opt = 'full-width-content'; 
    return $opt;
    } 
}

2single.php

<?php //FLTheme::sidebar('left'); ?>
		
	<div class="fl-content col-sm-12">
		<?php if(have_posts()) : while(have_posts()) : the_post(); ?>
			<?php get_template_part('content', 'single'); ?>
		<?php endwhile; endif; ?>
	</div>

<?php //FLTheme::sidebar('right'); ?>