Unfortunately this bug has been verified as not being in the cache.
You can remove the bug from being listed in the cache and place it into an unknown location. This will keep people from making a trip to the cache for a bug that isn't there.
On the bug page, under Travel Bug Owner Options is a pulldown menu labled 'Recalculate Distance', in there is the option "Mark Bug Missing".
You can always retrieve the bug back out at a later time if it is found or re-released. Thanks.