Yes you can.

How to;

On the side bar menu, click on the investments tab as shown below.

Once selected, a drop down menu appears.

On the menu, select Money market investments, then select Money market investment listings.

Path to follow;
Dashboard>Investments>Money Market Investments>Money Market Investment Listings

Once selected, a page with all Money Market Investments appears as shown below.

To completely delete a Money Market Investment, click on the void button as shown below.

NB: This will completely delete the Money Market Investment.