Dashboard on clients site – Is it a must?

Hi there I just joined as a Gold member. I haven’t had a chance to do much exploring just yet however I did install a couple of plugins on a client site (Smush is absolutely smashing!). I quickly learned that in order to activate the plugin I need to install the WPMUDEV dashboard onto the client’s WP. However it’s not exactly something I want to show or give access to my clients just like that. Is this a must? Can I remove it after installing the plugins? If not can I hide it? How would I prevent clients trying to login? Confused…