Removed unused variable to avoid compilation warning

Change-Id: Iba0753180c4f856bf6883574a8feb1b213f60523
Reviewed-on: http://review.couchbase.org/43385
Reviewed-by: Sriram Ganesan <sriram@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>