Remove business process flow from form in Dynamics 365

Hello everyone!
I need to remove business process flow from form in Dynamics 365.
The problem is it's the BPF from managed solution, so I'm not able to remove it from solution, I can only deactivate it.
I've tried to set processid/stageid/traversedpath to null, unfortunatelly it didn't help.
I know that BPF structure has changed much in D365.

Could anyone please tell me, how to get rid of the BPF?
Thank you in advance.