// Separate containers by evict units.
// Remove deleted pod containers if all sources are ready.
cgc.removeOldestN(unit, len(unit)) // Remove all.
// Enforce max containers per evict unit.
// Enforce max total number of containers.
// Leave an equal number of containers per evict unit (min: 1).
// If we still need to evict, evict oldest first.
// Set ready sandboxes to be active.
// Sort the sandboxes by age.