Is there any advantage to keeping OGELs no longer used?

Question

We have a couple of OGELs that are no longer used. I do not see any use for them in the future, as we are moving away from military special products. So, is there any advantage to keeping these OGELs, or should I cancel them through SPIRE? We do still have another two OGELs and SIEL that are still in current use, so we are not getting rid of all our licences.