Removing CPUs from RHEL 5.10 server

Hello:

I have a RHEL 5.10 server with 2 x 8-core processors. Due to Oracle licensing issues, we may need to remove the second proc to bring ourselves into license compliance. Is it as simple as shutting down the server and removing the processor? I'd like to clean up the OS if there are any remnants of the other processor/cores.

Oracle doesn't allow disablement of cores either at the OS or hardware level so that strategy is out.

Thank you!