CBQE-0: fix type in remove command

Change-Id: I17d70a11b43679c7747de16ed949e41cc5957790
Reviewed-on: http://review.couchbase.org/38411
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>