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.