Remove/adjust duplicate loadout transfer logic in headless

[freghar]

Is your enhancement related to a problem?
CBA implemented a "naked unit bug workaround" in CBATeam/CBA_A3#1406, making the ACEX acex_headless_transferLoadout setting obsolete (the way I understood it per the long discussion in the PR).

While the functionality is not exactly the same, it is similar enough to where it might not be worth the maintenance cost, so I would suggest removing it.

Solution you'd like:
I don't particularly care either way.

Alternatives you've considered:
Keeping both settings separate and maybe throwing a warning if both are enabled (assuming this could cause issues).

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[jonpas]

Yes, this should be done. I was focusing on acemod/ACE3#8415 in the meantime though.