Remove constants for "enum virDomainRestart" - they were never used in libvirt
Remove constants for "enum virDomainRestart" - they were never used in libvirt

klynch/ruby-libvirt,pronix/ruby-libvirt,pronix/ruby-libvirt,klynch/ruby-libvirt,libvirt/ruby-libvirt,klynch/ruby-libvirt,libvirt/ruby-libvirt,libvirt/ruby-libvirt,pronix/ruby-libvirt