Existing setup/config confusion - NAT hiding while on OpenVPN

[shockwavecs]

Hey all,
I came into this job with limited use with pfsense. I am trying to understand why the previous admin has a "NAT hide" NAT rule on the gateway for systems on OpenVPN using Split Tunnel. Any idea why this would be setup? I uses one of our public IPs to "hide" traffic, etc.

Virtual IP page:

The NAT Rule does not exist in the NAT inbound page but exists in the NAT outbound section to the openvpn subnet.

sorry if confusing. Just trying to see if I can free up the IP. Thanks.