Deleting a Function 
Use caution when you delete a function. You must first remove the function from any existing risk before you delete it.
Choose .
Choose Filter.
An empty row appears at the top of the list of functions.
Enter search criteria to locate the function you want to delete.
You can refer to Viewing a Function for instructions on searching for the function that you want to delete.
Once you find the function, select the row and choose the Delete pushbutton.
A confirmation message appears.
Choose OK.