Hi Salvatore,
The approval settings are inherited in a delivery from the Campaign it's associated with and deliveries which are stand alone do not have approvals enabled.
Hence the best approach should be to change the Campaign template and choose the approval to no as shown in the screenshot below.
Path Edit > Advanced Campaign parameters


This should not show the approvals at all.
Else, you may also change the campaign template to disable all the approvals and it will not show up on any deliveries which are built in a Campaign using this Template.
Regards,
Adhiyan