When operation modes are no longer required, we can even delete them with RZ04 transaction.
Goto transaction RZ04 as shown below :
In the above screen, there are 2 operation modes (day, night) configured.
Select the operation mode to be deleted as shown in the screen and navigate to
Operation mode -> delete as shown below
System prompts to confirm the deletion as shown below :
Click on Yes to confirm deletion.
Operation mode will be deleted as shown below :
(Please note that operation mode day got deleted in the below screen)
Please follow the same process to delete the operation mode night