I'm the maintener for all RPM packages.
I have no plan to remove nmap from dependancy for the moment and I don't have time to maintain another repo for one company (that's the first time someone ask to remove nmap).
But in the futur, I will transform the nmap requirement by suggest (a feature introduce in rpm 2.12). I cannot do it for the moment because RHel 7 use rpm 2.11.
I publish all srpm and the spec file are on github, you can rebuild the rpm if you need it quick.
For more discutions on this subject, come on IRC : I try to be present often as possible.