Do the NS Record get deleted if the delegate subzone remove

[#1]

Hi Experts,

We have requirement to migrate subzone records to parent zone which is under infoblox servers.
Presently the subzone is delegated to third-party server.
Here my question is if we remove the delegated subzone under parent zone, will the NS Record related to subzone get removed automatically or do we need to remove manually.

[#2]

Hello,

Deleting the actual delegated subzone itself, will also delete the delegation (NS) record in the parent zone automatically. No need to manaully delete these records.

JoeB