how to remove stack units added by accident

Hi all

I got a dell mxl switch for my that I inputed the wrong command for, now I am trying to undo it but I can't figure out how. 

What happened was this: 

I inputted this:

interface range tengigabitethernet 0/1 – 32 

...other config...

then I did this:

interface range tengigabitethernet 1/1 – 32 

on the same switch. I shouldn't have done that. 

Now running-config shows these guys:

interface TenGigabitEthernet 0/56
no ip address
flowcontrol rx on tx off
shutdown
!
stack-unit 1 provision MXL-10/40GbE
!
stack-unit 1 port 41 portmode quad
!
stack-unit 1 port 45 portmode quad
!
stack-unit 1 port 49 portmode quad
!
stack-unit 1 port 53 portmode quad
!
interface TenGigabitEthernet 1/1
no ip address
flowcontrol rx on tx off
shutdown
!
interface TenGigabitEthernet 1/2
no ip address
flowcontrol rx on tx off
shutdown

I tried to delete the startup-config and reload but these are still there afterwards.

Thanks