I want to deactivate PayPal integration in my form

Yes, you can deactivate "PayPal" payment integration from your form. You can use the "Purchase Order Tool" for creating payment forms, order forms or purchase order forms without payment vendor integration:

https://www.jotform.com/help/323-Mastering-Payment-Form-Integrations-with-JotForm

https://apps.jotform.com/app/purchase_order_app

Feel free to ask more questions if you need further assistance.