There is a way for partners to remove adders from Pricing Modules to be saved as a draft or archived. Follow the following Tutorial:
If an adder cannot be removed because it is being used by a pricing model, follow these steps.
Click settings > pricing > pricing models
Click into the pricing model(s) the adder is being used by.
Click the x next to the adder. This will remove the adder from the pricing model.
Save changes.
You can now click settings > pricing > adders, and click "active" on the adder and change it to archived or inactive.