Strips the wordpress admins css, leaves you raw

customdash.php

<?php
/**
 * Plugin Name: Pneumatic Dashboard
 * Plugin URI: http://eyeversuseye.com/pneumatic/dashboard
 * Description: Pneumatic dashboard
 * Version: 0.1
 * Author: Eivin Landa
 * Author URI: http://www.forsvunnet.co.uk
 * License: MIT
 */
 
 
class Pneumatic_Dashboard {
  public function __construct() {
    if ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) {
      return;
    }
 
    add_action( 'admin_enqueue_scripts', array( $this, 'admin_css' ), 9999 );
    add_action( 'login_init', array( $this, 'login_css' ), 9999 );
  }
 
  public function admin_css() {
    wp_deregister_style('wp-admin');
    wp_deregister_style('dashicons');
    wp_deregister_style('woocommerce_admin_menu_styles');
    wp_deregister_style('login');
  }
  public function login_css() {
    add_filter( 'style_loader_tag', '__return_null' );
  }
}
 
// Initsialise the plugin
add_action( 'muplugins_loaded', create_function( '', 'new Pneumatic_Dashboard();' ) );