Need a WHM/cPanel expert to DE-configure a DNS cluster

I have a WHM server that has a DNS cluster of 3 separate DNS servers. I no longer need this configuration but I need to have the main WHM server go back to being the DNS sever again and it will need to know that its the DNS server, run DNS services, and answer to the 3 NS names (ns1. ns2. ns3.)

I configured this many years ago have have almost entirely forgotten how to configure these things so I need someone who is very familiar with WHM and how its DNS features work.

This is just a one-time gig.

Please respond back here and explain something about your level of expertise with WHM and DNS and the rate you want to be paid.