False triggering effector/no-unnecessary-combination on combine with fn

[Lonli-Lokli]

Plusing should ignore combine operator in source for a sample if it has fn specified

sample({
clock: $desks,
source: combine({ desks: $desks, id: $id }, ({ desks, id }) => findActiveDesk(desks, id)),
filter: desk => isNullable(desk),
target: noActiveDeskFound
});