Remove unused key `add` on `laThematicArea`
Remove unused key `add` on `laThematicArea`

usu/ecamp3,usu/ecamp3,pmattmann/ecamp3,pmattmann/ecamp3,ecamp/ecamp3,ecamp/ecamp3,usu/ecamp3,pmattmann/ecamp3,ecamp/ecamp3,pmattmann/ecamp3,usu/ecamp3,ecamp/ecamp3