This package is a limited arch package (only for ppc64) and its release is according to the packaging guidelines for epel:

https://fedoraproject.org/wiki/EPEL:Packaging#Limited_Arch_Packages

This package should not be removed (in fact I just need it). I was about to rebase it to the current libvncserver in RHEL:

libvncserver-0.9.9-11.el7.src.rpm

So the package would be called:

libvncserver-0.9.9-0.11.el7.src.rpm

Well, actually with the recent updates is:
libvncserver-0.9.9-12.el7_5.src.rpm --> libvncserver-0.9.9-0.12.el7_5.src.rpm

I updated it but it's blocked in Koji:

https://koji.fedoraproject.org/koji/taskinfo?taskID=27998743

"BuildError: package libvncserver is blocked for tag epel7-testing-candidate"

Can someone please revert the block? Thanks.

@slaanesh libvncserver is unblocked for epel7.