Changing contributors and authors templates…

I have two aims : changing contributors.php and authors.php, using my child theme based on twenty fourteen.

I already created a contributors.php in my child folder. It is very different than the original one, but I cannot see any change on my site. There is someone there who could explain me why?

This is the content of my actual contributors.php file in the child’s theme:

<?php
/**
 * Template Name: Contributor Page
 *
 * @package WordPress
 * @subpackage Twenty_Fourteen
 * @since Twenty Fourteen 1.0
 */

get_header(); ?>

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

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

			<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
				<?php
					the_title( '<header class="entry-header"><h1 class="entry-title">', '</h1></header><!-- .entry-header -->' );

					// Output the authors list.
					twentyfourteen_list_authors('exclude_admin=1&hide_empty=1');

					edit_post_link( __( 'Edit', 'twentyfourteen' ), '<footer class="entry-meta"><span class="edit-link">', '</span></footer>' );
				?>
			</article><!-- #post-## -->

			<?php
					// 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

As you will see, I delete three elements from the original contributors.php file:

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

get_sidebar();
get_footer();

I supposed that I have to make something more but I don’t know what…