Apparently, there's no way to remove *one* plugin from the Must-Use list...

But then, found a filter that does even better:  
`show_advanced_plugins` will completely hide the sight of the Must-Use plugins. 

After all, if you're trying to hide something of this nature, then hide it all...

It's inside the class `WP_Plugins_List_Table` and takes two arguments: a boolean and the plugin type (`mustuse` and `dropins`).

Check [this article][1] for a reference of MU and **specially** Drop-ins. But, for the sake of the wiki, I'll post the DI table at the end of this answer.

----
The Drop-in plugin
----
For testing this procedure we need one of those. Create a file named ***`db.php`*** at the **root** of your wp-content folder and copy this:

    <?php
    /*
    	Plugin Name: Just for testing Drop-ins
    	Version: 0.1
    	Author: WPSE-53866
    	Author URI: http://wordpress.stackexchange.com/
    */

----
The Must-use plugin
----
Then, this one inside the `mu-plugins` folder, and set the parameters of the class.

    <?php
    /*
    Plugin Name: Hide Must-Use and Drop-ins from the Plugins listing
    Plugin URI: http://wordpress.stackexchange.com/a/53866
    Description: Used to hide the Must-Use and Drop-ins plugins from all users except one. Also can hide a selected plugin from the regular list, be it active or not.
    Version: 1.0
    Author: WordPress-StackExchange
    */
    
    /**
     * Parameters of the class
     *
     * @super_admin 	: string  (required)	: the user which is able to see everything
     * @can_see_mustuse : boolean (required)	: can other users see the Must-Use list?
     * @can_see_dropins : boolean (required)	: can other users see the Drop-ins list?
     * @hide_this_one	: string  (optional)	: plugin to hide in the regular listing
     *
     * Reference article for Must-Use and Drop-ins
     * http://hakre.wordpress.com/2010/05/01/must-use-and-drop-ins-plugins/
     */
    
    add_action('admin_init', 'wpse_53866_fire_plugin');
    
    function wpse_53866_fire_plugin() 
    {
    	global $pagenow;
    	if( 'plugins.php' != $pagenow ) 
    		return;
    
    	$wpse53866_HideAdvancedPlugins_instance = new Wpse53866_HideAdvancedPlugins(
    		array(
    			'super_admin' 		=> 'the_user_login',
    			'can_see_mustuse'	=> true,
    			'can_see_dropins'	=> false,
    			'hide_this_one'		=> 'akismet/akismet.php'
    		)
    	);
    }
    
    class Wpse53866_HideAdvancedPlugins
    {
        public function __construct($data)
        {		
    		$this->user 	 = $data['super_admin'];
    		$this->mustuse  = $data['can_see_mustuse'];
    		$this->dropins  = $data['can_see_dropins'];
    		$this->hide 	 = isset($data['hide_this_one']) ? $data['hide_this_one'] : false;
    		
    		if($this->hide)
    			add_filter('all_plugins', array(&$this, 'on_list_plugins') );
    		
    		add_filter('show_advanced_plugins', array(&$this, 'on_list_advanced'), 10, 2 );
        }
        	
    	public function on_list_plugins($plugins)
    	{
    	        global $current_user;
    
    			if( $this->user != $current_user->user_login ) 
    				unset($plugins[$this->hide]);
    
    	       return $plugins;
    	}
    	
    	public function on_list_advanced($show, $type)
    	{
    	        global $current_user;
    	
    			if( $this->user != $current_user->user_login ) 
    			{
    				if( 'mustuse' == $type ) 
    					return $this->mustuse;
    
    				if( 'dropins' == $type ) 
    					return $this->dropins;
    			}
    
    	       return true;
    	}
    }
    

----

Reference
----
by [hakre on wordpress][1]

![list of drop-ins plugins][2]


  [1]: http://hakre.wordpress.com/2010/05/01/must-use-and-drop-ins-plugins/
  [2]: https://i.sstatic.net/DFlhy.png