Remove "My sites" from Admin but not super admin

When a student creates a new site in our network and goes to their dashboard, they can see and click on the "My Sites" link under the Dashboard dropdown to see the thousands of other sites in the entire network and this is not acceptable.

I was able to successfully remove this from the admin Bar by using the Custom Admin Bar plugin but it still remains in the dashboard.

Obviously, we want to keep this option when logged in as the Super Admin which btw is called "Sites" not "my sites".