Remove expired ports:

2019-05-15 lang/phantomjs: Project has been discontinued: https://github.com/ariya/phantomjs/issues/15344
2019-11-01 net-mgmt/statsd: depends on expired www/node6
2019-11-01 palm/p5-Palm: obsolete technology
2019-11-01 shells/sparforte: uses expired bdb48
2019-11-01 sysutils/pcbsd-utils-qt5: No longer maintained upstream
2019-11-01 sysutils/sysadm: No longer maintained upstream
2019-11-01 sysutils/sysadm-client: No longer maintained upstream
2019-11-01 textproc/kibana5: depends on expired www/node6
2019-11-01 textproc/kibana5-search-guard: Depends on expired www/node6 via textproc/kibana5
2019-11-01 textproc/p5-EBook-Tools: Depends on expired palm/p5-Palm
2019-10-16 textproc/xml-parse.el: Unfetchable, unmaintained
2019-11-01 www/bigbluebutton: Depends on expired www/tomcat6
2019-04-30 www/node6: Node.js 6.x LTS reaches end-of-life on 2019-04-30, see https://github.com/nodejs/Release
2019-11-01 www/pebble: depends on expired www/tomcat6
2019-08-01 www/tomcat6: End-of-life since 2017