square.onCustomerCustomAttributeDefinitionVisibleDeleted subscribes to customer.custom_attribute_definition.visible.deleted for the selected seller. It requires CUSTOMERS_READ.
Example
automations/square-on-customer-custom-attribute-definition-visible-deleted.automation.ts
Event
A custom attribute definition that’s visible to your application was deleted. This event replaces the deprecated customer.custom_attribute_definition.public.deleted event. The signal resolves to the officialSquare.CustomerCustomAttributeDefinitionVisibleDeletedEvent payload with type narrowed to customer.custom_attribute_definition.visible.deleted.