MB-17461 Remove dead assignment in forest-kvstore
MB-17461 Remove dead assignment in forest-kvstore

Resolve clang analyzer warning

Change-Id: I93a195c8c12cde2c355caad895e8bc50cd89d530
Reviewed-on: http://review.couchbase.org/59607
Reviewed-by: Sriram Ganesan <fde85c3124eed34938bb85159f430bf7e5b650f6@couchbase.com>
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/ep-engine,teligent-ru/ep-engine,hisundar/ep-engine,daverigby/kv_engine,couchbase/ep-engine,membase/ep-engine,hisundar/ep-engine,daverigby/kv_engine,couchbase/ep-engine,owendCB/ep-engine,membase/ep-engine,owendCB/ep-engine,daverigby/ep-engine,daverigby/kv_engine,daverigby/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,owendCB/ep-engine,daverigby/kv_engine,teligent-ru/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine,membase/ep-engine,membase/ep-engine,daverigby/ep-engine,couchbase/ep-engine,couchbase/ep-engine,hisundar/ep-engine