Fix redundant error checking.
Fix redundant error checking.

This was causing lint to fail.

Change-Id: I6b1e0a8837f16aa57208a2585095e81dc1cf8d46
Reviewed-on: http://review.couchbase.org/83562
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>
Tested-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

brett19/gocb