Remove failing test.

Since backtrace sanitization was temporarily removed, corresponding
should have also been removed.

Change-Id: Ied88e9d11d5dc3625378cc23a7c8bc6046dd9517
Reviewed-on: http://review.couchbase.org/33086
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>