status of lalapps_SFTclean

As discussed in and CW/software/lalsuite#64 !1217 (merged) , this has no test script and no maintainer, so it would be a candidate for removal. But we decided to leave it for the moment and check whether it is still needed for SkyHough or any other pipelines. Any opinions @alicia.sintes @pep.covas @rodrigo.tenorio ?

cc @karl-wette