CBQE:0 Remove check on docs_rep_queue stat from xdcr pause resume testing. This stat is being removed

Change-Id: Ib09a273e1b8b28e4d8574cf0cd68a4085f8d7f96
Reviewed-on: http://review.couchbase.org/40079
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Aruna Piravi <aruna@couchbase.com>
Reviewed-by: Aruna Piravi <aruna@couchbase.com>