Sample Plugin for "Cleaning up the WordPress Admin"

admincleanup.php

<?php
/**
 * Your Name Global Plugin
 *
 * Core settings for Your Name sites.
 *
 * @package   core_yourplugin
 * @author    Your Name <you@email.com>
 * @link      http://example.com
 * @copyright 2014 Your Name
 *
 * @wordpress-plugin
 * Plugin Name: Your Name Global Plugin
 * Plugin URI:  http://example.com
 * Description: Core settings for Your Name sites.
 * Version:     1.0.0
 * Author:      Your Name <you@email.com>
 * Author URI:  http://example.com
 */

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
    die;
}

/**
 * Turn off things that can screw things up.
 *
 * @since   1.0.0
 *
 * @package core_yourplugin
 * @author  Your Name <you@email.com>
 */
define( 'DISALLOW_FILE_EDIT', true );
define( 'DISALLOW_FILE_MODS', true );


/**
 * Plugin class.
 *
 * @package core_yourplugin
 * @author  Your Name <you@email.com>
 */
class core_yourplugin {

    /**
     * Plugin version, used for cache-busting of style and script file references.
     *
     * @since   1.0.0
     *
     * @const   string
     */
    const VERSION = '1.0.0';

    /**
     * Unique identifier for your plugin.
     *
     * Use this value (not the variable name) as the text domain when internationalizing strings of text. It should
     * match the Text Domain file header in the main plugin file.
     *
     * @since    1.0.0
     *
     * @var      string
     */
    protected $plugin_slug = 'yourplugin-mu';

    /**
     * Instance of this class.
     *
     * @since    1.0.0
     *
     * @var      object
     */
    protected static $instance = null;

    /**
     * Slug of the plugin screen.
     *
     * @since    1.0.0
     *
     * @var      string
     */
    protected $plugin_screen_hook_suffix = null;

    /**
     * Initialize the plugin by setting localization, filters, and administration functions.
     *
     * @since     1.0.0
     */
    private function __construct() {

	    add_action( 'admin_menu', array( $this, 'yourplugin_remove_tools' ), 999 );
	    add_filter( 'all_plugins', array( $this, 'yourplugin_filter_plugins' ) );
	    add_action( 'wp_before_admin_bar_render', array( $this, 'yourplugin_remove_admin_bar_links' ) );
	    add_action( 'admin_init', array( $this, 'yourplugin_disable_dashboard_widgets' ) );

    }

    	/**
	* Return an instance of this class.
	*
	* @since     1.0.0
     	*
     	* @return    object    A single instance of this class.
     	*/
    	public static function get_instance() {

        	// If the single instance hasn't been set, set it now.
        	if ( null == self::$instance ) {
            	self::$instance = new self;
        	}

        	return self::$instance;
    	}

	/**
	 * NOTE:  Remove Stupid Tools.php & Sensitive Plugins from View
	 *
	 * @since    1.0.0
	 */
	public function yourplugin_remove_tools() {
		remove_submenu_page( 'tools.php', 'tools.php' );
		remove_menu_page( 'better-wp-security' );
		remove_menu_page( 'w3tc_dashboard' );
	}

	/**
	 * NOTE:  Hide Sensitive Plugins from Plugins Listing
	 *
	 * @since    1.0.0
	 */
	public function yourplugin_filter_plugins( $plugins ) {
		$hidden = array(
			'Better WP Security',
			'W3 Total Cache'
		);
		foreach ($plugins as $key => &$plugin ) {
			if ( in_array( $plugin["Name"], $hidden ) ) {
				unset($plugins[$key]);
			}
		}
		return $plugins;
	}

	/**
	 * NOTE:  Hide Extraneous Plugin Options from the Menu Bar
	 *
	 * @since    1.0.0
	 */
	public function yourplugin_remove_admin_bar_links() {
		global $wp_admin_bar;
		$wp_admin_bar->remove_menu('w3tc-faq');
		$wp_admin_bar->remove_menu('w3tc-support');
	}

	/**
	 * NOTE:  Hide WordPress News
	 *
	 * @since    1.0.0
	 */
	public function yourplugin_disable_dashboard_widgets() {
		remove_meta_box( 'dashboard_primary', 'dashboard', 'normal' );
	}

}

core_yourplugin::get_instance();