remove useless Requires(post)
RPM guarantees that all requires will be installed before this package
and Requires(post) is needed in 2 cases:
* When you don't need it in Requires (not the case at all)
* When you have dependency loops and you need to give hint what
to install first (not the case for crypto-policies)
Signed-off-by: Igor Gnatenko <ignatenko@redhat.com>