Remove expired ports:
2015-07-20 devel/rubygem-builder31: not used by other ports anymore
2015-07-20 devel/rubygem-timers1: not used by other ports anymore
2015-07-20 net/rubygem-rubyntlm01: not used by other ports anymore
2015-07-20 security/rubygem-net-scp11: not used by other ports anymore
2015-07-20 security/rubygem-net-ssh27: not used by other ports anymore