Clear WordPress Header

functions.php

// =========================================================================
// REMOVE JUNK FROM HEAD
// =========================================================================
    remove_action('wp_head', 'rsd_link'); // remove really simple discovery link
    remove_action('wp_head', 'wp_generator'); // remove wordpress version

    remove_action('wp_head', 'feed_links', 2); // remove rss feed links (make sure you add them in yourself if youre using feedblitz or an rss service)
    remove_action('wp_head', 'feed_links_extra', 3); // removes all extra rss feed links

    remove_action('wp_head', 'index_rel_link'); // remove link to index page
    remove_action('wp_head', 'wlwmanifest_link'); // remove wlwmanifest.xml (needed to support windows live writer)

    remove_action('wp_head', 'start_post_rel_link', 10, 0); // remove random post link
    remove_action('wp_head', 'parent_post_rel_link', 10, 0); // remove parent post link
    remove_action('wp_head', 'adjacent_posts_rel_link', 10, 0); // remove the next and previous post links
    remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );

    remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0 );

function disable_wp_emojicons() {

  // all actions related to emojis
  remove_action( 'admin_print_styles', 'print_emoji_styles' );
  remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
  remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
  remove_action( 'wp_print_styles', 'print_emoji_styles' );
  remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
  remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
  remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );

  // filter to remove TinyMCE emojis
  add_filter( 'tiny_mce_plugins', 'disable_emojicons_tinymce' );
}
add_action( 'init', 'disable_wp_emojicons' );

function disable_emojicons_tinymce( $plugins ) {
  if ( is_array( $plugins ) ) {
    return array_diff( $plugins, array( 'wpemoji' ) );
  } else {
    return array();
  }
}

add_filter( 'emoji_svg_url', '__return_false' );


// remove wp version param from any enqueued scripts
// Remove WP Version From Styles	
add_filter( 'style_loader_src', 'sdt_remove_ver_css_js', 9999 );
// Remove WP Version From Scripts
add_filter( 'script_loader_src', 'sdt_remove_ver_css_js', 9999 );

// Function to remove version numbers
function sdt_remove_ver_css_js( $src ) {
	if ( strpos( $src, 'ver=' ) )
		$src = remove_query_arg( 'ver', $src );
	return $src;
}