Yes, all good ideas and Damiano confirms that we can actually remove the complete_lt_ses functionality. But then we should also remove the complete_lt_gmf functionality, change the .ini files, remove the parameters, change the validation, the database, the tests, etc etc. A lot of work for which I have open a ticket: https://bugs.launchpad.net/oq-engine/+bug/1189397
It will go in a future sprint.