math/polymake: update to 4.5
Port changes:
- update DISTVERSION (obviously ;-))
- remove compiler:openmp after commit 07fb2d5e9d001934f1670d01aec1f536f14ebde2
- remove patches patch-libnauty and patch-support_install.pl since they have been incorporated upstream
Upstream changes: https://polymake.org/doku.php/news/release_4_5
PR: 260395
Reported by: Philipp Ost <bsd@philippost.de> (maintainer)