Don't name the variable we're not using

That eliminates the compiler warning that we're not using it ;-)

Change-Id: I6581889d930e1055bd5f8815ca6174701ea8e877
Reviewed-on: http://review.couchbase.org/31199
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>