Remove left sidebar to have full width in specific pages

I’m using standard twentyfourteen theme.
I have two pages that I want to show full-screen width, without left sidebar.
I tried to use for that pages page model “Full Width Page” but nothing changes: i see always left sidebar and i can’t have my contents in full screen width

How can i resolve this issue?

For your information, this is the content of full-width.php that i have in folder themes\twentyfourteen\page-templates
<?php
/**
* Template Name: Full Width Page
*
* @package WordPress
* @subpackage Twenty_Fourteen
* @since Twenty Fourteen 1.0
*/

get_header(); ?>

<div id=”main-content” class=”main-content”>

<?php
if ( is_front_page() && twentyfourteen_has_featured_posts() ) {
// Include the featured content template.
get_template_part( ‘featured-content’ );
}
?>

<div id=”primary” class=”content-area”>
<div id=”content” class=”site-content” role=”main”>
<?php
// Start the Loop.
while ( have_posts() ) :
the_post();

// Include the page content template.
get_template_part( ‘content’, ‘page’ );

// If comments are open or we have at least one comment, load up the comment template.
if ( comments_open() || get_comments_number() ) {
comments_template();
}
endwhile;
?>
</div><!– #content –>
</div><!– #primary –>
</div><!– #main-content –>

<?php
get_sidebar();
get_footer();

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