Remove unnecessary tags that Wordpress insert in header

gistfile1.php

<?php
remove_action( 'wp_head', 'wp_generator' );
remove_action( 'wp_head', 'rsd_link' );
remove_action( 'wp_head', 'wlwmanifest_link' );
remove_action( 'wp_head', 'start_post_rel_link' );
remove_action( 'wp_head', 'index_rel_link' );
remove_action( 'wp_head', 'wp_shortlink_wp_head' );
remove_action( 'wp_head', 'adjacent_posts_rel_link' );