[LAA] Don't check for free in evaluatePtrAddRecAtMaxBTCWillNotWrap() (#202341)

The fact that an object of a certain size existed at the the location at
some point is sufficient to prove the desired nowrap fact. Whether the
object still exists there doesn't matter in this context.

GitOrigin-RevId: 188c0486bd8db4ac51afe1b986228fafe1bdf21b