You can complete this in a few easy steps:
Log in to your Delta PMS account.
Once logged in successfully, go to the side bar on your left screen.
On the navigation menu, choose the Rates and Availability then select the Rate Plan sub menu.
In the All Properties tab, select a property then it will be navigated to the Rate Details page.
Select a room type in the room type dropdown.
Go to Rate Plans section.
Choose Existing Rate Plan, click See details.
Move on to the Sales Channel section.
Select the non Delta PMS Channels.
Go to the Surcharge section for the non Delta PMS Channels property.
Click the Edit button.
Set the Surcharge Value to 0.
You can leave the surcharge type as is (Percentage or Amount).
Click the Save button to update the configuration.
The surcharge will be removed from the Rate Plan, and no additional charge will be applied.